It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 774 is not a prime number.
For example, 490 774 can be divided by 2: 490 774 / 2 = 245 387.
For 490 774 to be a prime number, it would have been required that 490 774 has only two divisors, i.e., itself and 1.
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490 774 is an even number, because it is evenly divisible by 2: 490 774 / 2 = 245 387.
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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 490 774 is about 700.553.
Thus, the square root of 490 774 is not an integer, and therefore 490 774 is not a square number.
The square of a number (here 490 774) is the result of the product of this number (490 774) by itself (i.e., 490 774 × 490 774); the square of 490 774 is sometimes called "raising 490 774 to the power 2", or "490 774 squared".
The square of 490 774 is 240 859 119 076 because 490 774 × 490 774 = 490 7742 = 240 859 119 076.
As a consequence, 490 774 is the square root of 240 859 119 076.
The multiples of 490 774 are all integers evenly divisible by 490 774, that is all numbers such that the remainder of the division by 490 774 is zero. There are infinitely many multiples of 490 774. The smallest multiples of 490 774 are: