It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 438 016 is not a prime number.
For example, 438 016 can be divided by 2: 438 016 / 2 = 219 008.
For 438 016 to be a prime number, it would have been required that 438 016 has only two divisors, i.e., itself and 1.
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438 016 is an even number, because it is evenly divisible by 2: 438 016 / 2 = 219 008.
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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 438 016 is about 661.828.
Thus, the square root of 438 016 is not an integer, and therefore 438 016 is not a square number.
The square of a number (here 438 016) is the result of the product of this number (438 016) by itself (i.e., 438 016 × 438 016); the square of 438 016 is sometimes called "raising 438 016 to the power 2", or "438 016 squared".
The square of 438 016 is 191 858 016 256 because 438 016 × 438 016 = 438 0162 = 191 858 016 256.
As a consequence, 438 016 is the square root of 191 858 016 256.
The multiples of 438 016 are all integers evenly divisible by 438 016, that is all numbers such that the remainder of the division by 438 016 is zero. There are infinitely many multiples of 438 016. The smallest multiples of 438 016 are: