It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 416 is not a prime number.
For example, 490 416 can be divided by 2: 490 416 / 2 = 245 208.
For 490 416 to be a prime number, it would have been required that 490 416 has only two divisors, i.e., itself and 1.
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490 416 is an even number, because it is evenly divisible by 2: 490 416 / 2 = 245 208.
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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 490 416 is about 700.297.
Thus, the square root of 490 416 is not an integer, and therefore 490 416 is not a square number.
The square of a number (here 490 416) is the result of the product of this number (490 416) by itself (i.e., 490 416 × 490 416); the square of 490 416 is sometimes called "raising 490 416 to the power 2", or "490 416 squared".
The square of 490 416 is 240 507 853 056 because 490 416 × 490 416 = 490 4162 = 240 507 853 056.
As a consequence, 490 416 is the square root of 240 507 853 056.
The multiples of 490 416 are all integers evenly divisible by 490 416, that is all numbers such that the remainder of the division by 490 416 is zero. There are infinitely many multiples of 490 416. The smallest multiples of 490 416 are: