It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 748 398 is not a prime number.
For example, 748 398 can be divided by 2: 748 398 / 2 = 374 199.
For 748 398 to be a prime number, it would have been required that 748 398 has only two divisors, i.e., itself and 1.
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748 398 is an even number, because it is evenly divisible by 2: 748 398 / 2 = 374 199.
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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 748 398 is about 865.100.
Thus, the square root of 748 398 is not an integer, and therefore 748 398 is not a square number.
The square of a number (here 748 398) is the result of the product of this number (748 398) by itself (i.e., 748 398 × 748 398); the square of 748 398 is sometimes called "raising 748 398 to the power 2", or "748 398 squared".
The square of 748 398 is 560 099 566 404 because 748 398 × 748 398 = 748 3982 = 560 099 566 404.
As a consequence, 748 398 is the square root of 560 099 566 404.
The multiples of 748 398 are all integers evenly divisible by 748 398, that is all numbers such that the remainder of the division by 748 398 is zero. There are infinitely many multiples of 748 398. The smallest multiples of 748 398 are: