It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 990 442 is not a prime number.
For example, 990 442 can be divided by 2: 990 442 / 2 = 495 221.
For 990 442 to be a prime number, it would have been required that 990 442 has only two divisors, i.e., itself and 1.
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990 442 is an even number, because it is evenly divisible by 2: 990 442 / 2 = 495 221.
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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 990 442 is about 995.210.
Thus, the square root of 990 442 is not an integer, and therefore 990 442 is not a square number.
The square of a number (here 990 442) is the result of the product of this number (990 442) by itself (i.e., 990 442 × 990 442); the square of 990 442 is sometimes called "raising 990 442 to the power 2", or "990 442 squared".
The square of 990 442 is 980 975 355 364 because 990 442 × 990 442 = 990 4422 = 980 975 355 364.
As a consequence, 990 442 is the square root of 980 975 355 364.
The multiples of 990 442 are all integers evenly divisible by 990 442, that is all numbers such that the remainder of the division by 990 442 is zero. There are infinitely many multiples of 990 442. The smallest multiples of 990 442 are: