It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 118 428 is not a prime number.
For example, 118 428 can be divided by 2: 118 428 / 2 = 59 214.
For 118 428 to be a prime number, it would have been required that 118 428 has only two divisors, i.e., itself and 1.
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118 428 is an even number, because it is evenly divisible by 2: 118 428 / 2 = 59 214.
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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 118 428 is about 344.134.
Thus, the square root of 118 428 is not an integer, and therefore 118 428 is not a square number.
The square of a number (here 118 428) is the result of the product of this number (118 428) by itself (i.e., 118 428 × 118 428); the square of 118 428 is sometimes called "raising 118 428 to the power 2", or "118 428 squared".
The square of 118 428 is 14 025 191 184 because 118 428 × 118 428 = 118 4282 = 14 025 191 184.
As a consequence, 118 428 is the square root of 14 025 191 184.
The multiples of 118 428 are all integers evenly divisible by 118 428, that is all numbers such that the remainder of the division by 118 428 is zero. There are infinitely many multiples of 118 428. The smallest multiples of 118 428 are: