It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 261 338 is not a prime number.
For example, 490 261 338 can be divided by 2: 490 261 338 / 2 = 245 130 669.
For 490 261 338 to be a prime number, it would have been required that 490 261 338 has only two divisors, i.e., itself and 1.
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490 261 338 is an even number, because it is evenly divisible by 2: 490 261 338 / 2 = 245 130 669.
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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 490 261 338 is about 22 141.846.
Thus, the square root of 490 261 338 is not an integer, and therefore 490 261 338 is not a square number.
The square of a number (here 490 261 338) is the result of the product of this number (490 261 338) by itself (i.e., 490 261 338 × 490 261 338); the square of 490 261 338 is sometimes called "raising 490 261 338 to the power 2", or "490 261 338 squared".
The square of 490 261 338 is 240 356 179 537 550 240 because 490 261 338 × 490 261 338 = 490 261 3382 = 240 356 179 537 550 240.
As a consequence, 490 261 338 is the square root of 240 356 179 537 550 240.
490 261 338 is a number with 9 digits.
The multiples of 490 261 338 are all integers evenly divisible by 490 261 338, that is all numbers such that the remainder of the division by 490 261 338 is zero. There are infinitely many multiples of 490 261 338. The smallest multiples of 490 261 338 are: