It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 676 is not a prime number.
For example, 490 676 can be divided by 2: 490 676 / 2 = 245 338.
For 490 676 to be a prime number, it would have been required that 490 676 has only two divisors, i.e., itself and 1.
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490 676 is an even number, because it is evenly divisible by 2: 490 676 / 2 = 245 338.
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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 490 676 is about 700.483.
Thus, the square root of 490 676 is not an integer, and therefore 490 676 is not a square number.
The square of a number (here 490 676) is the result of the product of this number (490 676) by itself (i.e., 490 676 × 490 676); the square of 490 676 is sometimes called "raising 490 676 to the power 2", or "490 676 squared".
The square of 490 676 is 240 762 936 976 because 490 676 × 490 676 = 490 6762 = 240 762 936 976.
As a consequence, 490 676 is the square root of 240 762 936 976.
The multiples of 490 676 are all integers evenly divisible by 490 676, that is all numbers such that the remainder of the division by 490 676 is zero. There are infinitely many multiples of 490 676. The smallest multiples of 490 676 are: