Is 798 a prime number? What are the divisors of 798?

## Parity of 798

798 is an even number, because it is evenly divisible by 2: 798 / 2 = 399.

Find out more:

## Is 798 a perfect square number?

A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 798 is about 28.249.

Thus, the square root of 798 is not an integer, and therefore 798 is not a square number.

## What is the square number of 798?

The square of a number (here 798) is the result of the product of this number (798) by itself (i.e., 798 × 798); the square of 798 is sometimes called "raising 798 to the power 2", or "798 squared".

The square of 798 is 636 804 because 798 × 798 = 7982 = 636 804.

As a consequence, 798 is the square root of 636 804.

## Number of digits of 798

798 is a number with 3 digits.

## What are the multiples of 798?

The multiples of 798 are all integers evenly divisible by 798, that is all numbers such that the remainder of the division by 798 is zero. There are infinitely many multiples of 798. The smallest multiples of 798 are:

## How to determine whether an integer is a prime number?

To determine the primality of a number, several algorithms can be used. The most naive technique is to test all divisors strictly smaller to the number of which we want to determine the primality (here 798). First, we can eliminate all even numbers greater than 2 (and hence 4, 6, 8…). Then, we can stop this check when we reach the square root of the number of which we want to determine the primality (here the square root is about 28.249). Historically, the sieve of Eratosthenes (dating from the Greek mathematics) implements this technique in a relatively efficient manner.

More modern techniques include the sieve of Atkin, probabilistic algorithms, and the cyclotomic AKS test.

## Numbers near 798

• Preceding numbers: …796, 797
• Following numbers: 799, 800

### Nearest numbers from 798

• Preceding prime number: 797
• Following prime number: 809
Find out whether some integer is a prime number