It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 338 738 is not a prime number.
For example, 338 738 can be divided by 2: 338 738 / 2 = 169 369.
For 338 738 to be a prime number, it would have been required that 338 738 has only two divisors, i.e., itself and 1.
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338 738 is an even number, because it is evenly divisible by 2: 338 738 / 2 = 169 369.
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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 338 738 is about 582.012.
Thus, the square root of 338 738 is not an integer, and therefore 338 738 is not a square number.
The square of a number (here 338 738) is the result of the product of this number (338 738) by itself (i.e., 338 738 × 338 738); the square of 338 738 is sometimes called "raising 338 738 to the power 2", or "338 738 squared".
The square of 338 738 is 114 743 432 644 because 338 738 × 338 738 = 338 7382 = 114 743 432 644.
As a consequence, 338 738 is the square root of 114 743 432 644.
The multiples of 338 738 are all integers evenly divisible by 338 738, that is all numbers such that the remainder of the division by 338 738 is zero. There are infinitely many multiples of 338 738. The smallest multiples of 338 738 are: