It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 23 988 is not a prime number.
For example, 23 988 can be divided by 2: 23 988 / 2 = 11 994.
For 23 988 to be a prime number, it would have been required that 23 988 has only two divisors, i.e., itself and 1.
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23 988 is an even number, because it is evenly divisible by 2: 23 988 / 2 = 11 994.
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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 23 988 is about 154.881.
Thus, the square root of 23 988 is not an integer, and therefore 23 988 is not a square number.
The square of a number (here 23 988) is the result of the product of this number (23 988) by itself (i.e., 23 988 × 23 988); the square of 23 988 is sometimes called "raising 23 988 to the power 2", or "23 988 squared".
The square of 23 988 is 575 424 144 because 23 988 × 23 988 = 23 9882 = 575 424 144.
As a consequence, 23 988 is the square root of 575 424 144.
The multiples of 23 988 are all integers evenly divisible by 23 988, that is all numbers such that the remainder of the division by 23 988 is zero. There are infinitely many multiples of 23 988. The smallest multiples of 23 988 are: