It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 438 is not a prime number.
For example, 490 438 can be divided by 2: 490 438 / 2 = 245 219.
For 490 438 to be a prime number, it would have been required that 490 438 has only two divisors, i.e., itself and 1.
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490 438 is an even number, because it is evenly divisible by 2: 490 438 / 2 = 245 219.
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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 490 438 is about 700.313.
Thus, the square root of 490 438 is not an integer, and therefore 490 438 is not a square number.
The square of a number (here 490 438) is the result of the product of this number (490 438) by itself (i.e., 490 438 × 490 438); the square of 490 438 is sometimes called "raising 490 438 to the power 2", or "490 438 squared".
The square of 490 438 is 240 529 431 844 because 490 438 × 490 438 = 490 4382 = 240 529 431 844.
As a consequence, 490 438 is the square root of 240 529 431 844.
The multiples of 490 438 are all integers evenly divisible by 490 438, that is all numbers such that the remainder of the division by 490 438 is zero. There are infinitely many multiples of 490 438. The smallest multiples of 490 438 are: