It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 388 is not a prime number.
For example, 489 388 can be divided by 2: 489 388 / 2 = 244 694.
For 489 388 to be a prime number, it would have been required that 489 388 has only two divisors, i.e., itself and 1.
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489 388 is an even number, because it is evenly divisible by 2: 489 388 / 2 = 244 694.
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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 489 388 is about 699.563.
Thus, the square root of 489 388 is not an integer, and therefore 489 388 is not a square number.
The square of a number (here 489 388) is the result of the product of this number (489 388) by itself (i.e., 489 388 × 489 388); the square of 489 388 is sometimes called "raising 489 388 to the power 2", or "489 388 squared".
The square of 489 388 is 239 500 614 544 because 489 388 × 489 388 = 489 3882 = 239 500 614 544.
As a consequence, 489 388 is the square root of 239 500 614 544.
The multiples of 489 388 are all integers evenly divisible by 489 388, that is all numbers such that the remainder of the division by 489 388 is zero. There are infinitely many multiples of 489 388. The smallest multiples of 489 388 are: