## 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**.

## Factorials of Numbers similar to **28**

## 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.