It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 498 478 is not a prime number.
For example, 498 478 can be divided by 2: 498 478 / 2 = 249 239.
For 498 478 to be a prime number, it would have been required that 498 478 has only two divisors, i.e., itself and 1.
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498 478 is an even number, because it is evenly divisible by 2: 498 478 / 2 = 249 239.
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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 498 478 is about 706.030.
Thus, the square root of 498 478 is not an integer, and therefore 498 478 is not a square number.
The square of a number (here 498 478) is the result of the product of this number (498 478) by itself (i.e., 498 478 × 498 478); the square of 498 478 is sometimes called "raising 498 478 to the power 2", or "498 478 squared".
The square of 498 478 is 248 480 316 484 because 498 478 × 498 478 = 498 4782 = 248 480 316 484.
As a consequence, 498 478 is the square root of 248 480 316 484.
The multiples of 498 478 are all integers evenly divisible by 498 478, that is all numbers such that the remainder of the division by 498 478 is zero. There are infinitely many multiples of 498 478. The smallest multiples of 498 478 are: