It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 888 518 is not a prime number.
For example, 888 518 can be divided by 2: 888 518 / 2 = 444 259.
For 888 518 to be a prime number, it would have been required that 888 518 has only two divisors, i.e., itself and 1.
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888 518 is an even number, because it is evenly divisible by 2: 888 518 / 2 = 444 259.
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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 888 518 is about 942.612.
Thus, the square root of 888 518 is not an integer, and therefore 888 518 is not a square number.
The square of a number (here 888 518) is the result of the product of this number (888 518) by itself (i.e., 888 518 × 888 518); the square of 888 518 is sometimes called "raising 888 518 to the power 2", or "888 518 squared".
The square of 888 518 is 789 464 236 324 because 888 518 × 888 518 = 888 5182 = 789 464 236 324.
As a consequence, 888 518 is the square root of 789 464 236 324.
The multiples of 888 518 are all integers evenly divisible by 888 518, that is all numbers such that the remainder of the division by 888 518 is zero. There are infinitely many multiples of 888 518. The smallest multiples of 888 518 are: