# What is 28 factorial ?

Steps to calculate factorial of 28

## How to calculate the factorial of 28

To find 28 factorial, or 28!, simply use the formula that multiplies the number 28 by all positive whole numbers less than it.

Let's look at how to calculate the Factorial of Twenty-eight :

28! is exactly : 304888344611713860501504000000

Factorial of 28 can be calculated as:
28! = 28 x 27 x 26 x 25 x ... x 3 x 2 x 1

The number of trailing zeros in 28! is 6

The number of digits in 28 factorial is 30.

## What Is Factorial?

A factorial is represented by an integer and an exclamation symbol. In arithmetic, factorial is a multiplication operation of natural numbers .

It multiplies the number by every basic number that is less than it .

Symbolically, it is symbolized as "!".

The function is used, among other things, to get the "n" way items can be arranged .

## Factorial Formula

To find the factorial of any given number, replace the value for n in the given method :

n! = n × (n-1) × (n-2) × (n-3) × ….× 3 × 2 × 1

The expansion of the formula provides the numbers to be replicated to each other to obtain the factorial of the number.

We can also work out a factorial from the prior one. The factorial of any number is that number times the factorial of (that number minus 1).

So the rule is : n! = n × (n−1)!

Example :
28! Factorial = 28 x 27 x 26 x 25 x ... x 3 x 2 x 1 = 28 × 27! = 304888344611713860501504000000

## What are Factorials Used For?

The best use of factorial is in Combinations and Permutations.

Example : Determine how to arrange letters without repeating?

There one way for 1 letter "a":
2 ways for two letters "ab": ab, ba.
There are 6 ways for 3 letters "abc": abc acb cab bac bca.
There are 24 ways for 1234 of the letters "abcd"

## Frequently Asked Questions on Factorial

### Can we have factorials for negative numbers ?

Negative number factorials are undefined

### What Is 0!

Zero factorial or Factorial of 0 is simple, and its own value is corresponding to 1. So, 0! = 1.