It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 626 is not a prime number.
For example, 490 626 can be divided by 2: 490 626 / 2 = 245 313.
For 490 626 to be a prime number, it would have been required that 490 626 has only two divisors, i.e., itself and 1.
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490 626 is an even number, because it is evenly divisible by 2: 490 626 / 2 = 245 313.
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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 490 626 is about 700.447.
Thus, the square root of 490 626 is not an integer, and therefore 490 626 is not a square number.
The square of a number (here 490 626) is the result of the product of this number (490 626) by itself (i.e., 490 626 × 490 626); the square of 490 626 is sometimes called "raising 490 626 to the power 2", or "490 626 squared".
The square of 490 626 is 240 713 871 876 because 490 626 × 490 626 = 490 6262 = 240 713 871 876.
As a consequence, 490 626 is the square root of 240 713 871 876.
The multiples of 490 626 are all integers evenly divisible by 490 626, that is all numbers such that the remainder of the division by 490 626 is zero. There are infinitely many multiples of 490 626. The smallest multiples of 490 626 are: