It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 238 is not a prime number.
For example, 240 238 can be divided by 2: 240 238 / 2 = 120 119.
For 240 238 to be a prime number, it would have been required that 240 238 has only two divisors, i.e., itself and 1.
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240 238 is an even number, because it is evenly divisible by 2: 240 238 / 2 = 120 119.
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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 240 238 is about 490.141.
Thus, the square root of 240 238 is not an integer, and therefore 240 238 is not a square number.
The square of a number (here 240 238) is the result of the product of this number (240 238) by itself (i.e., 240 238 × 240 238); the square of 240 238 is sometimes called "raising 240 238 to the power 2", or "240 238 squared".
The square of 240 238 is 57 714 296 644 because 240 238 × 240 238 = 240 2382 = 57 714 296 644.
As a consequence, 240 238 is the square root of 57 714 296 644.
The multiples of 240 238 are all integers evenly divisible by 240 238, that is all numbers such that the remainder of the division by 240 238 is zero. There are infinitely many multiples of 240 238. The smallest multiples of 240 238 are: