It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 338 is not a prime number.
For example, 720 338 can be divided by 2: 720 338 / 2 = 360 169.
For 720 338 to be a prime number, it would have been required that 720 338 has only two divisors, i.e., itself and 1.
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720 338 is an even number, because it is evenly divisible by 2: 720 338 / 2 = 360 169.
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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 720 338 is about 848.727.
Thus, the square root of 720 338 is not an integer, and therefore 720 338 is not a square number.
The square of a number (here 720 338) is the result of the product of this number (720 338) by itself (i.e., 720 338 × 720 338); the square of 720 338 is sometimes called "raising 720 338 to the power 2", or "720 338 squared".
The square of 720 338 is 518 886 834 244 because 720 338 × 720 338 = 720 3382 = 518 886 834 244.
As a consequence, 720 338 is the square root of 518 886 834 244.
The multiples of 720 338 are all integers evenly divisible by 720 338, that is all numbers such that the remainder of the division by 720 338 is zero. There are infinitely many multiples of 720 338. The smallest multiples of 720 338 are: