It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 118 388 is not a prime number.
For example, 118 388 can be divided by 2: 118 388 / 2 = 59 194.
For 118 388 to be a prime number, it would have been required that 118 388 has only two divisors, i.e., itself and 1.
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118 388 is an even number, because it is evenly divisible by 2: 118 388 / 2 = 59 194.
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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 118 388 is about 344.076.
Thus, the square root of 118 388 is not an integer, and therefore 118 388 is not a square number.
The square of a number (here 118 388) is the result of the product of this number (118 388) by itself (i.e., 118 388 × 118 388); the square of 118 388 is sometimes called "raising 118 388 to the power 2", or "118 388 squared".
The square of 118 388 is 14 015 718 544 because 118 388 × 118 388 = 118 3882 = 14 015 718 544.
As a consequence, 118 388 is the square root of 14 015 718 544.
The multiples of 118 388 are all integers evenly divisible by 118 388, that is all numbers such that the remainder of the division by 118 388 is zero. There are infinitely many multiples of 118 388. The smallest multiples of 118 388 are: