It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 408 is not a prime number.
For example, 490 408 can be divided by 2: 490 408 / 2 = 245 204.
For 490 408 to be a prime number, it would have been required that 490 408 has only two divisors, i.e., itself and 1.
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490 408 is an even number, because it is evenly divisible by 2: 490 408 / 2 = 245 204.
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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 490 408 is about 700.291.
Thus, the square root of 490 408 is not an integer, and therefore 490 408 is not a square number.
The square of a number (here 490 408) is the result of the product of this number (490 408) by itself (i.e., 490 408 × 490 408); the square of 490 408 is sometimes called "raising 490 408 to the power 2", or "490 408 squared".
The square of 490 408 is 240 500 006 464 because 490 408 × 490 408 = 490 4082 = 240 500 006 464.
As a consequence, 490 408 is the square root of 240 500 006 464.
The multiples of 490 408 are all integers evenly divisible by 490 408, that is all numbers such that the remainder of the division by 490 408 is zero. There are infinitely many multiples of 490 408. The smallest multiples of 490 408 are: