It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 418 988 is not a prime number.
For example, 7 418 988 can be divided by 2: 7 418 988 / 2 = 3 709 494.
For 7 418 988 to be a prime number, it would have been required that 7 418 988 has only two divisors, i.e., itself and 1.
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7 418 988 is an even number, because it is evenly divisible by 2: 7 418 988 / 2 = 3 709 494.
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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 7 418 988 is about 2 723.782.
Thus, the square root of 7 418 988 is not an integer, and therefore 7 418 988 is not a square number.
The square of a number (here 7 418 988) is the result of the product of this number (7 418 988) by itself (i.e., 7 418 988 × 7 418 988); the square of 7 418 988 is sometimes called "raising 7 418 988 to the power 2", or "7 418 988 squared".
The square of 7 418 988 is 55 041 382 944 144 because 7 418 988 × 7 418 988 = 7 418 9882 = 55 041 382 944 144.
As a consequence, 7 418 988 is the square root of 55 041 382 944 144.
The multiples of 7 418 988 are all integers evenly divisible by 7 418 988, that is all numbers such that the remainder of the division by 7 418 988 is zero. There are infinitely many multiples of 7 418 988. The smallest multiples of 7 418 988 are: