It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 338 018 is not a prime number.
For example, 338 018 can be divided by 2: 338 018 / 2 = 169 009.
For 338 018 to be a prime number, it would have been required that 338 018 has only two divisors, i.e., itself and 1.
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338 018 is an even number, because it is evenly divisible by 2: 338 018 / 2 = 169 009.
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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 338 018 is about 581.393.
Thus, the square root of 338 018 is not an integer, and therefore 338 018 is not a square number.
The square of a number (here 338 018) is the result of the product of this number (338 018) by itself (i.e., 338 018 × 338 018); the square of 338 018 is sometimes called "raising 338 018 to the power 2", or "338 018 squared".
The square of 338 018 is 114 256 168 324 because 338 018 × 338 018 = 338 0182 = 114 256 168 324.
As a consequence, 338 018 is the square root of 114 256 168 324.
The multiples of 338 018 are all integers evenly divisible by 338 018, that is all numbers such that the remainder of the division by 338 018 is zero. There are infinitely many multiples of 338 018. The smallest multiples of 338 018 are: