It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 488 398 is not a prime number.
For example, 488 398 can be divided by 2: 488 398 / 2 = 244 199.
For 488 398 to be a prime number, it would have been required that 488 398 has only two divisors, i.e., itself and 1.
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488 398 is an even number, because it is evenly divisible by 2: 488 398 / 2 = 244 199.
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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 488 398 is about 698.855.
Thus, the square root of 488 398 is not an integer, and therefore 488 398 is not a square number.
The square of a number (here 488 398) is the result of the product of this number (488 398) by itself (i.e., 488 398 × 488 398); the square of 488 398 is sometimes called "raising 488 398 to the power 2", or "488 398 squared".
The square of 488 398 is 238 532 606 404 because 488 398 × 488 398 = 488 3982 = 238 532 606 404.
As a consequence, 488 398 is the square root of 238 532 606 404.
The multiples of 488 398 are all integers evenly divisible by 488 398, that is all numbers such that the remainder of the division by 488 398 is zero. There are infinitely many multiples of 488 398. The smallest multiples of 488 398 are: