It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 136 is not a prime number.
For example, 490 136 can be divided by 2: 490 136 / 2 = 245 068.
For 490 136 to be a prime number, it would have been required that 490 136 has only two divisors, i.e., itself and 1.
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490 136 is an even number, because it is evenly divisible by 2: 490 136 / 2 = 245 068.
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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 490 136 is about 700.097.
Thus, the square root of 490 136 is not an integer, and therefore 490 136 is not a square number.
The square of a number (here 490 136) is the result of the product of this number (490 136) by itself (i.e., 490 136 × 490 136); the square of 490 136 is sometimes called "raising 490 136 to the power 2", or "490 136 squared".
The square of 490 136 is 240 233 298 496 because 490 136 × 490 136 = 490 1362 = 240 233 298 496.
As a consequence, 490 136 is the square root of 240 233 298 496.
The multiples of 490 136 are all integers evenly divisible by 490 136, that is all numbers such that the remainder of the division by 490 136 is zero. There are infinitely many multiples of 490 136. The smallest multiples of 490 136 are: