It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 380 316 is not a prime number.
For example, 380 316 can be divided by 2: 380 316 / 2 = 190 158.
For 380 316 to be a prime number, it would have been required that 380 316 has only two divisors, i.e., itself and 1.
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380 316 is an even number, because it is evenly divisible by 2: 380 316 / 2 = 190 158.
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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 380 316 is about 616.698.
Thus, the square root of 380 316 is not an integer, and therefore 380 316 is not a square number.
The square of a number (here 380 316) is the result of the product of this number (380 316) by itself (i.e., 380 316 × 380 316); the square of 380 316 is sometimes called "raising 380 316 to the power 2", or "380 316 squared".
The square of 380 316 is 144 640 259 856 because 380 316 × 380 316 = 380 3162 = 144 640 259 856.
As a consequence, 380 316 is the square root of 144 640 259 856.
The multiples of 380 316 are all integers evenly divisible by 380 316, that is all numbers such that the remainder of the division by 380 316 is zero. There are infinitely many multiples of 380 316. The smallest multiples of 380 316 are: