It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 988 is not a prime number.
For example, 489 988 can be divided by 2: 489 988 / 2 = 244 994.
For 489 988 to be a prime number, it would have been required that 489 988 has only two divisors, i.e., itself and 1.
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489 988 is an even number, because it is evenly divisible by 2: 489 988 / 2 = 244 994.
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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 489 988 is about 699.991.
Thus, the square root of 489 988 is not an integer, and therefore 489 988 is not a square number.
The square of a number (here 489 988) is the result of the product of this number (489 988) by itself (i.e., 489 988 × 489 988); the square of 489 988 is sometimes called "raising 489 988 to the power 2", or "489 988 squared".
The square of 489 988 is 240 088 240 144 because 489 988 × 489 988 = 489 9882 = 240 088 240 144.
As a consequence, 489 988 is the square root of 240 088 240 144.
The multiples of 489 988 are all integers evenly divisible by 489 988, that is all numbers such that the remainder of the division by 489 988 is zero. There are infinitely many multiples of 489 988. The smallest multiples of 489 988 are: