It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 300 328 428 is not a prime number.
For example, 300 328 428 can be divided by 2: 300 328 428 / 2 = 150 164 214.
For 300 328 428 to be a prime number, it would have been required that 300 328 428 has only two divisors, i.e., itself and 1.
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300 328 428 is an even number, because it is evenly divisible by 2: 300 328 428 / 2 = 150 164 214.
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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 300 328 428 is about 17 329.986.
Thus, the square root of 300 328 428 is not an integer, and therefore 300 328 428 is not a square number.
The square of a number (here 300 328 428) is the result of the product of this number (300 328 428) by itself (i.e., 300 328 428 × 300 328 428); the square of 300 328 428 is sometimes called "raising 300 328 428 to the power 2", or "300 328 428 squared".
The square of 300 328 428 is 90 197 164 664 951 184 because 300 328 428 × 300 328 428 = 300 328 4282 = 90 197 164 664 951 184.
As a consequence, 300 328 428 is the square root of 90 197 164 664 951 184.
300 328 428 is a number with 9 digits.
The multiples of 300 328 428 are all integers evenly divisible by 300 328 428, that is all numbers such that the remainder of the division by 300 328 428 is zero. There are infinitely many multiples of 300 328 428. The smallest multiples of 300 328 428 are: