It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 340 988 is not a prime number.
For example, 340 988 can be divided by 2: 340 988 / 2 = 170 494.
For 340 988 to be a prime number, it would have been required that 340 988 has only two divisors, i.e., itself and 1.
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340 988 is an even number, because it is evenly divisible by 2: 340 988 / 2 = 170 494.
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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 340 988 is about 583.942.
Thus, the square root of 340 988 is not an integer, and therefore 340 988 is not a square number.
The square of a number (here 340 988) is the result of the product of this number (340 988) by itself (i.e., 340 988 × 340 988); the square of 340 988 is sometimes called "raising 340 988 to the power 2", or "340 988 squared".
The square of 340 988 is 116 272 816 144 because 340 988 × 340 988 = 340 9882 = 116 272 816 144.
As a consequence, 340 988 is the square root of 116 272 816 144.
The multiples of 340 988 are all integers evenly divisible by 340 988, that is all numbers such that the remainder of the division by 340 988 is zero. There are infinitely many multiples of 340 988. The smallest multiples of 340 988 are: