It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 398 302 is not a prime number.
For example, 398 302 can be divided by 2: 398 302 / 2 = 199 151.
For 398 302 to be a prime number, it would have been required that 398 302 has only two divisors, i.e., itself and 1.
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398 302 is an even number, because it is evenly divisible by 2: 398 302 / 2 = 199 151.
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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 398 302 is about 631.112.
Thus, the square root of 398 302 is not an integer, and therefore 398 302 is not a square number.
The square of a number (here 398 302) is the result of the product of this number (398 302) by itself (i.e., 398 302 × 398 302); the square of 398 302 is sometimes called "raising 398 302 to the power 2", or "398 302 squared".
The square of 398 302 is 158 644 483 204 because 398 302 × 398 302 = 398 3022 = 158 644 483 204.
As a consequence, 398 302 is the square root of 158 644 483 204.
The multiples of 398 302 are all integers evenly divisible by 398 302, that is all numbers such that the remainder of the division by 398 302 is zero. There are infinitely many multiples of 398 302. The smallest multiples of 398 302 are: