It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 8 627 338 is not a prime number.
For example, 8 627 338 can be divided by 2: 8 627 338 / 2 = 4 313 669.
For 8 627 338 to be a prime number, it would have been required that 8 627 338 has only two divisors, i.e., itself and 1.
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8 627 338 is an even number, because it is evenly divisible by 2: 8 627 338 / 2 = 4 313 669.
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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 8 627 338 is about 2 937.233.
Thus, the square root of 8 627 338 is not an integer, and therefore 8 627 338 is not a square number.
The square of a number (here 8 627 338) is the result of the product of this number (8 627 338) by itself (i.e., 8 627 338 × 8 627 338); the square of 8 627 338 is sometimes called "raising 8 627 338 to the power 2", or "8 627 338 squared".
The square of 8 627 338 is 74 430 960 966 244 because 8 627 338 × 8 627 338 = 8 627 3382 = 74 430 960 966 244.
As a consequence, 8 627 338 is the square root of 74 430 960 966 244.
The multiples of 8 627 338 are all integers evenly divisible by 8 627 338, that is all numbers such that the remainder of the division by 8 627 338 is zero. There are infinitely many multiples of 8 627 338. The smallest multiples of 8 627 338 are: