It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 438 is not a prime number.
For example, 489 438 can be divided by 2: 489 438 / 2 = 244 719.
For 489 438 to be a prime number, it would have been required that 489 438 has only two divisors, i.e., itself and 1.
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489 438 is an even number, because it is evenly divisible by 2: 489 438 / 2 = 244 719.
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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 489 438 is about 699.598.
Thus, the square root of 489 438 is not an integer, and therefore 489 438 is not a square number.
The square of a number (here 489 438) is the result of the product of this number (489 438) by itself (i.e., 489 438 × 489 438); the square of 489 438 is sometimes called "raising 489 438 to the power 2", or "489 438 squared".
The square of 489 438 is 239 549 555 844 because 489 438 × 489 438 = 489 4382 = 239 549 555 844.
As a consequence, 489 438 is the square root of 239 549 555 844.
The multiples of 489 438 are all integers evenly divisible by 489 438, that is all numbers such that the remainder of the division by 489 438 is zero. There are infinitely many multiples of 489 438. The smallest multiples of 489 438 are: