It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 628 is not a prime number.
For example, 490 628 can be divided by 2: 490 628 / 2 = 245 314.
For 490 628 to be a prime number, it would have been required that 490 628 has only two divisors, i.e., itself and 1.
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490 628 is an even number, because it is evenly divisible by 2: 490 628 / 2 = 245 314.
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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 490 628 is about 700.448.
Thus, the square root of 490 628 is not an integer, and therefore 490 628 is not a square number.
The square of a number (here 490 628) is the result of the product of this number (490 628) by itself (i.e., 490 628 × 490 628); the square of 490 628 is sometimes called "raising 490 628 to the power 2", or "490 628 squared".
The square of 490 628 is 240 715 834 384 because 490 628 × 490 628 = 490 6282 = 240 715 834 384.
As a consequence, 490 628 is the square root of 240 715 834 384.
The multiples of 490 628 are all integers evenly divisible by 490 628, that is all numbers such that the remainder of the division by 490 628 is zero. There are infinitely many multiples of 490 628. The smallest multiples of 490 628 are: