Is 490 a prime number? What are the divisors of 490?

## Parity of 490

490 is an even number, because it is evenly divisible by 2: 490 / 2 = 245.

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## Is 490 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 490 is about 22.136.

Thus, the square root of 490 is not an integer, and therefore 490 is not a square number.

## What is the square number of 490?

The square of a number (here 490) is the result of the product of this number (490) by itself (i.e., 490 × 490); the square of 490 is sometimes called "raising 490 to the power 2", or "490 squared".

The square of 490 is 240 100 because 490 × 490 = 4902 = 240 100.

As a consequence, 490 is the square root of 240 100.

## Number of digits of 490

490 is a number with 3 digits.

## What are the multiples of 490?

The multiples of 490 are all integers evenly divisible by 490, that is all numbers such that the remainder of the division by 490 is zero. There are infinitely many multiples of 490. The smallest multiples of 490 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 490). 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 22.136). 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 490

• Preceding numbers: …488, 489
• Following numbers: 491, 492

### Nearest numbers from 490

• Preceding prime number: 487
• Following prime number: 491
Find out whether some integer is a prime number