It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 239 988 is not a prime number.
For example, 239 988 can be divided by 2: 239 988 / 2 = 119 994.
For 239 988 to be a prime number, it would have been required that 239 988 has only two divisors, i.e., itself and 1.
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239 988 is an even number, because it is evenly divisible by 2: 239 988 / 2 = 119 994.
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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 239 988 is about 489.886.
Thus, the square root of 239 988 is not an integer, and therefore 239 988 is not a square number.
The square of a number (here 239 988) is the result of the product of this number (239 988) by itself (i.e., 239 988 × 239 988); the square of 239 988 is sometimes called "raising 239 988 to the power 2", or "239 988 squared".
The square of 239 988 is 57 594 240 144 because 239 988 × 239 988 = 239 9882 = 57 594 240 144.
As a consequence, 239 988 is the square root of 57 594 240 144.
The multiples of 239 988 are all integers evenly divisible by 239 988, that is all numbers such that the remainder of the division by 239 988 is zero. There are infinitely many multiples of 239 988. The smallest multiples of 239 988 are: