# 400 Squared

400 squared, 4002, is the number you get when multiplying 400 times 400. It can also be looked at as exponentiation involving the base 400 and the exponent 2. The term is usually pronounced four hundred times four hundred or four hundred squared. The square of 400 is a perfect square because the number is the product of the two equal integers 400. It can be written as 400 x 400 or in exponential form. Read on to learn everything about the number four hundred squared, including the useful identities.

4002 = 160000
400 x 400 = 160000

The inverse operation of squaring four hundred is extracting the square root of 400, explained here. In the next section we elaborate on what is 400 squared, and there you can also find our calculator.

## What is 400 Squared

A square is a flat shape with four equal sides; every angle is 90°. Hence, a square with side length 400 has an area of 160000.

400 squared equals the sum of the first 400 odd numbers:

$\sum_{i=1}^{400} (2i-1)$ = 160000

In addition, the number can be calculated from 399 squared using the following identity:

n2 = (n − 1)2 + (n − 1) + n = (n − 1)2 + (2n − 1)
4002 = 3992 + 399 + 400 = 3992 + 799 = 160000

It can be also be computed from 399 squared with this identity:

n2 = 2 x (n − 1)2 − (n − 2)2 + 2
4002 = 2 x 3992 – 3982 + 2 = 2 x 159201 – 158404 + 2 = 160000

The difference between the perfect square of 400 and its predecessor, 399, can be calculated with the identity n2 − (n − 1)2 = 2n − 1:

2 x 400 – 1 = 799 = 4002 – 3992 = 160000 – 159201 = 799

400 is even, and the square numbers of even numbers are also even: (2n)2 = 4n2.

Squares of even numbers like 400 are divisible by 4 for $\frac{(2n)^{2}}{4}$ = n2.

If you want to calculate the square of any number, not only integers like 400, you can use our calculator below. Just insert your number; the calculation is done automatically.

### Calculate Squared Number

Number:
Value:

If this tool has been valuable to you, then bookmark it now. Besides the square of four hundred, other squares on our site include, for instance: ## Four Hundred Squared

By reading so far you know all about squaring the number 400 and calculating it using recursive methods, or as sum, product or by exponentiation. 400 squared is equivalent to 160000.

If you were searching for what is 400 squared in math or if you typed whats 400 squared in the search engine, then you now have all the answers, too.

The same goes for searches like square400, and 400 to the 2nd power, just to name a few more examples people are often looking for.

Note that you can also find many perfect squares including 400 squared using the search form in the sidebar and menu of this page.

To sum up,

400 squared = 400×400 = 4002 = 160000. The exponentiation form is mostly used to denote four hundred squared.