It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 308 is not a prime number.
For example, 240 308 can be divided by 2: 240 308 / 2 = 120 154.
For 240 308 to be a prime number, it would have been required that 240 308 has only two divisors, i.e., itself and 1.
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240 308 is an even number, because it is evenly divisible by 2: 240 308 / 2 = 120 154.
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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 240 308 is about 490.212.
Thus, the square root of 240 308 is not an integer, and therefore 240 308 is not a square number.
The square of a number (here 240 308) is the result of the product of this number (240 308) by itself (i.e., 240 308 × 240 308); the square of 240 308 is sometimes called "raising 240 308 to the power 2", or "240 308 squared".
The square of 240 308 is 57 747 934 864 because 240 308 × 240 308 = 240 3082 = 57 747 934 864.
As a consequence, 240 308 is the square root of 57 747 934 864.
The multiples of 240 308 are all integers evenly divisible by 240 308, that is all numbers such that the remainder of the division by 240 308 is zero. There are infinitely many multiples of 240 308. The smallest multiples of 240 308 are: