It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 298 338 is not a prime number.
For example, 298 338 can be divided by 2: 298 338 / 2 = 149 169.
For 298 338 to be a prime number, it would have been required that 298 338 has only two divisors, i.e., itself and 1.
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298 338 is an even number, because it is evenly divisible by 2: 298 338 / 2 = 149 169.
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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 298 338 is about 546.203.
Thus, the square root of 298 338 is not an integer, and therefore 298 338 is not a square number.
The square of a number (here 298 338) is the result of the product of this number (298 338) by itself (i.e., 298 338 × 298 338); the square of 298 338 is sometimes called "raising 298 338 to the power 2", or "298 338 squared".
The square of 298 338 is 89 005 562 244 because 298 338 × 298 338 = 298 3382 = 89 005 562 244.
As a consequence, 298 338 is the square root of 89 005 562 244.
The multiples of 298 338 are all integers evenly divisible by 298 338, that is all numbers such that the remainder of the division by 298 338 is zero. There are infinitely many multiples of 298 338. The smallest multiples of 298 338 are: