It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 424 is not a prime number.
For example, 490 424 can be divided by 2: 490 424 / 2 = 245 212.
For 490 424 to be a prime number, it would have been required that 490 424 has only two divisors, i.e., itself and 1.
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490 424 is an even number, because it is evenly divisible by 2: 490 424 / 2 = 245 212.
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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 490 424 is about 700.303.
Thus, the square root of 490 424 is not an integer, and therefore 490 424 is not a square number.
The square of a number (here 490 424) is the result of the product of this number (490 424) by itself (i.e., 490 424 × 490 424); the square of 490 424 is sometimes called "raising 490 424 to the power 2", or "490 424 squared".
The square of 490 424 is 240 515 699 776 because 490 424 × 490 424 = 490 4242 = 240 515 699 776.
As a consequence, 490 424 is the square root of 240 515 699 776.
The multiples of 490 424 are all integers evenly divisible by 490 424, that is all numbers such that the remainder of the division by 490 424 is zero. There are infinitely many multiples of 490 424. The smallest multiples of 490 424 are: