It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 988 278 is not a prime number.
For example, 988 278 can be divided by 2: 988 278 / 2 = 494 139.
For 988 278 to be a prime number, it would have been required that 988 278 has only two divisors, i.e., itself and 1.
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988 278 is an even number, because it is evenly divisible by 2: 988 278 / 2 = 494 139.
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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 988 278 is about 994.122.
Thus, the square root of 988 278 is not an integer, and therefore 988 278 is not a square number.
The square of a number (here 988 278) is the result of the product of this number (988 278) by itself (i.e., 988 278 × 988 278); the square of 988 278 is sometimes called "raising 988 278 to the power 2", or "988 278 squared".
The square of 988 278 is 976 693 405 284 because 988 278 × 988 278 = 988 2782 = 976 693 405 284.
As a consequence, 988 278 is the square root of 976 693 405 284.
The multiples of 988 278 are all integers evenly divisible by 988 278, that is all numbers such that the remainder of the division by 988 278 is zero. There are infinitely many multiples of 988 278. The smallest multiples of 988 278 are: