It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 738 216 is not a prime number.
For example, 738 216 can be divided by 2: 738 216 / 2 = 369 108.
For 738 216 to be a prime number, it would have been required that 738 216 has only two divisors, i.e., itself and 1.
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738 216 is an even number, because it is evenly divisible by 2: 738 216 / 2 = 369 108.
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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 738 216 is about 859.195.
Thus, the square root of 738 216 is not an integer, and therefore 738 216 is not a square number.
The square of a number (here 738 216) is the result of the product of this number (738 216) by itself (i.e., 738 216 × 738 216); the square of 738 216 is sometimes called "raising 738 216 to the power 2", or "738 216 squared".
The square of 738 216 is 544 962 862 656 because 738 216 × 738 216 = 738 2162 = 544 962 862 656.
As a consequence, 738 216 is the square root of 544 962 862 656.
The multiples of 738 216 are all integers evenly divisible by 738 216, that is all numbers such that the remainder of the division by 738 216 is zero. There are infinitely many multiples of 738 216. The smallest multiples of 738 216 are: