It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 988 is not a prime number.
For example, 267 988 can be divided by 2: 267 988 / 2 = 133 994.
For 267 988 to be a prime number, it would have been required that 267 988 has only two divisors, i.e., itself and 1.
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267 988 is an even number, because it is evenly divisible by 2: 267 988 / 2 = 133 994.
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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 267 988 is about 517.676.
Thus, the square root of 267 988 is not an integer, and therefore 267 988 is not a square number.
The square of a number (here 267 988) is the result of the product of this number (267 988) by itself (i.e., 267 988 × 267 988); the square of 267 988 is sometimes called "raising 267 988 to the power 2", or "267 988 squared".
The square of 267 988 is 71 817 568 144 because 267 988 × 267 988 = 267 9882 = 71 817 568 144.
As a consequence, 267 988 is the square root of 71 817 568 144.
The multiples of 267 988 are all integers evenly divisible by 267 988, that is all numbers such that the remainder of the division by 267 988 is zero. There are infinitely many multiples of 267 988. The smallest multiples of 267 988 are: