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# What Is The Prime Factorization Of 28

What is the prime factorization of 28? Answer: 2 * 2 * 7

The prime factorization of 28 has 3 prime factors. If you multiply all primes in the factorization together then 28=2 * 2 * 7. Prime factors can only have two factors(1 and itself) and only be divisible by those two factors. Any number where this rule applies can be called a prime factor. The biggest prime factor of 28 is 7. The smallest prime factor of 28 is 2.

## How To Write 28 As A Product Of Prime Factors

How to write 28 as a product of prime factors or in exponential notation? First we need to know the prime factorization of 28 which is 2 * 2 * 7. Next we add all numbers that are repeating more than once as exponents of these numbers.

Using exponential notation we can write 28=22*71

For clarity all readers should know that 28=2 * 2 * 7=22*71 this index form is the right way to express a number as a product of prime factors.

## Prime Factorization Of 28 With Upside Down Division Method

Prime factorization of 28 using upside down division method. Upside down division gives visual clarity when writing it on paper. It works by dividing the starting number 28 with its smallest prime factor(a figure that is only divisible with itself and 1). Then we continue the division with the answer of the last division. We find the smallest prime factor for each answer and make a division. We are essentially using successive divisions. This continues until we get an answer that is itself a prime factor. Then we make a list of all the prime factors that were used in the divisions and we call it prime factorization of 28.

2|28 We divide 28 with its smallest prime factor, which is 2
2|14 We divide 14 with its smallest prime factor, which is 2
7 The division of 2/14=7. 7 is a prime factor. Prime factorization is complete

The solved solution using upside down division is the prime factorization of 28=2 * 2 * 7. Remember that all divisions in this calculation have to be divisible, meaning they will leave no remainder.

## Mathematical Properties Of Integer 28 Calculator

28 is a composite figure. 28 is a composite number, because it has more divisors than 1 and itself. This is an even integer. 28 is an even number, because it can be divided by 2 without leaving a comma spot. This also means that 28 is not an odd digit. When we simplify Sin 28 degrees we get the value of sin(28)=0.27090578830787. Simplify Cos 28 degrees. The value of cos(28)=-0.96260586631357. Simplify Tan 28 degrees. Value of tan(28)=-0.28142960456427. When converting 28 in binary you get 11100. Converting decimal 28 in hexadecimal is 1c. The square root of 28=5.2915026221292. The cube root of 28=3.0365889718757. Square root of √28 simplified is 2√7. All radicals are now simplified and in their simplest form. Cube root of ∛28 simplified is 28. The simplified radicand no longer has any more cubed factors.

## Write Smaller Numbers Than 28 As A Product Of Prime Factors

Learn how to calculate factorization of smaller figures like:

## Express Bigger Numbers Than 28 As A Product Of Prime Factors

Learn how to calculate factorization of bigger amounts such as:

## Single Digit Properties For 28 Explained

• Integer 2 properties: 2 is the first of the primes and the only one to be even(the others are all odd). The first issue of Smarandache-Wellin in any base. Goldbach's conjecture states that all even numbers greater than 2 are the quantity of 2 primes. It is a complete Harshad, which is a number of Harshad in any expressed base. The third of the Fibonacci sequence, after 1 and before 3. Part of the Tetranacci Succession. Two is an oblong figure of the form n(n+1). 2 is the basis of the binary numbering system, used internally by almost all computers. Two is a number of: Perrin, Ulam, Catalan and Wedderburn-Etherington. Refactorizable, which means that it is divisible by the count of its divisors. Not being the total of the divisors proper to any other arithmetical value, 2 is an untouchable quantity. The first number of highly cototent and scarcely totiente (the only one to be both) and it is also a very large decimal. Second term of the succession of Mian-Chowla. A strictly non-palindrome. With one exception, all known solutions to the Znam problem begin with 2. Numbers are divisible by two (ie equal) if and only if its last digit is even. The first even numeral after zero and the first issue of the succession of Lucas. The aggregate of any natural value and its reciprocal is always greater than or equal to 2.
• Integer 8 properties: Eight is even and a cube of 2. It is a composite, with the following 4 divisors:1, 2, 4, 8. Since the total of the divisors(excluding itself) is 7<8, it is a defective number. The sixth of the Fibonacci sequence, after 5 and before 13. It is the quantity of the twin primes 3 and 5. The first octagonal value. 8 is a Ulam, centered heptagonal and Leyland number. All amounts are divisible by 8 if and only if the result formed by its last three digits is. A refactorizable, being divisible by the count of its divisors. At the same time a highly totter and highly cototent quantity. It is the fourth term of the succession of Mian-Chowla. Any odd greater than or equal to 3, elevated to the square, to which subtract is subtracted 1 is divisible by 8 (example: 7²=49 49-1=48 divisible by 8). The sum of two squares, 8=2²+2². The sum of the digits of its cube: 8³=512, 5+1+2=8. The first 4-digit binary:1000. Part of the Pythagorean triples (6, 8, 10), (8, 15, 17). Eight is a repeated number in the positional numbering system based on 3 (22) and on the base 7 (11).

## Finding Prime Factorization Of A Number

The prime factorization of 28 contains 3 primes. The prime factorization of 28 is and equals 2 * 2 * 7. This answer was calculated using the upside down division method. We could have also used other methods such as a factor tree to arrive to the same answer. The method used is not important. What is important is to correctly solve the solution.

## List of divisibility rules for finding prime factors faster

Knowing these divisibility rules will help you find primes more easily. Finding prime factors faster helps you solve prime factorization faster.

Rule 1: If the last digit of a number is 0, 2, 4, 6 or 8 then it is an even integer. All even integers are divisible by 2.

Rule 2: If the sum of digits of a number is divisible by 3 then the figure is also divisible by 3 and 3 is a prime factor(example: the digits of 102 are 1, 0 and 2 so 1+0+2=3 and 3 is divisible by 3, meaning that 102 is divisible by 3). The same logic works also for number 9.

Rule 3: If the last two digits of a number are 00 then this number is divisible by 4(example: we know that 212=200+12 and 200 has two zeros in the end making it divisible with 4. We also know that 4 is divisible with 12). In order to use this rule to it's fullest it is best to know multiples of 4.

Rule 4: If the last digit of a integer is 0 or 5 then it is divisible by 5. We all know that 2*5=10 which is why the zero is logical.

Rule 5: All numbers that are divisible by both 2 and 3 are also divisible by 6. This makes much sense because 2*3=6.

## What Is Prime Factorization Of A Number?

In mathematics breaking down a composite number(a positive integer that can be the sum of two smaller numbers multiplied together) into a multiplication of smaller figures is called factorization. When the same process is continued until all numbers have been broken down into their prime factor multiplications then this process is called prime factorization.

Using prime factorization we can find all primes contained in a number.