It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 396 508 is not a prime number.
For example, 396 508 can be divided by 2: 396 508 / 2 = 198 254.
For 396 508 to be a prime number, it would have been required that 396 508 has only two divisors, i.e., itself and 1.
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396 508 is an even number, because it is evenly divisible by 2: 396 508 / 2 = 198 254.
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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 396 508 is about 629.689.
Thus, the square root of 396 508 is not an integer, and therefore 396 508 is not a square number.
The square of a number (here 396 508) is the result of the product of this number (396 508) by itself (i.e., 396 508 × 396 508); the square of 396 508 is sometimes called "raising 396 508 to the power 2", or "396 508 squared".
The square of 396 508 is 157 218 594 064 because 396 508 × 396 508 = 396 5082 = 157 218 594 064.
As a consequence, 396 508 is the square root of 157 218 594 064.
The multiples of 396 508 are all integers evenly divisible by 396 508, that is all numbers such that the remainder of the division by 396 508 is zero. There are infinitely many multiples of 396 508. The smallest multiples of 396 508 are: