It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 320 508 is not a prime number.
For example, 320 508 can be divided by 2: 320 508 / 2 = 160 254.
For 320 508 to be a prime number, it would have been required that 320 508 has only two divisors, i.e., itself and 1.
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320 508 is an even number, because it is evenly divisible by 2: 320 508 / 2 = 160 254.
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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 320 508 is about 566.134.
Thus, the square root of 320 508 is not an integer, and therefore 320 508 is not a square number.
The square of a number (here 320 508) is the result of the product of this number (320 508) by itself (i.e., 320 508 × 320 508); the square of 320 508 is sometimes called "raising 320 508 to the power 2", or "320 508 squared".
The square of 320 508 is 102 725 378 064 because 320 508 × 320 508 = 320 5082 = 102 725 378 064.
As a consequence, 320 508 is the square root of 102 725 378 064.
The multiples of 320 508 are all integers evenly divisible by 320 508, that is all numbers such that the remainder of the division by 320 508 is zero. There are infinitely many multiples of 320 508. The smallest multiples of 320 508 are: