It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 264 is not a prime number.
For example, 998 264 can be divided by 2: 998 264 / 2 = 499 132.
For 998 264 to be a prime number, it would have been required that 998 264 has only two divisors, i.e., itself and 1.
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998 264 is an even number, because it is evenly divisible by 2: 998 264 / 2 = 499 132.
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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 998 264 is about 999.132.
Thus, the square root of 998 264 is not an integer, and therefore 998 264 is not a square number.
The square of a number (here 998 264) is the result of the product of this number (998 264) by itself (i.e., 998 264 × 998 264); the square of 998 264 is sometimes called "raising 998 264 to the power 2", or "998 264 squared".
The square of 998 264 is 996 531 013 696 because 998 264 × 998 264 = 998 2642 = 996 531 013 696.
As a consequence, 998 264 is the square root of 996 531 013 696.
The multiples of 998 264 are all integers evenly divisible by 998 264, that is all numbers such that the remainder of the division by 998 264 is zero. There are infinitely many multiples of 998 264. The smallest multiples of 998 264 are: