It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 738 678 is not a prime number.
For example, 738 678 can be divided by 2: 738 678 / 2 = 369 339.
For 738 678 to be a prime number, it would have been required that 738 678 has only two divisors, i.e., itself and 1.
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738 678 is an even number, because it is evenly divisible by 2: 738 678 / 2 = 369 339.
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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 738 678 is about 859.464.
Thus, the square root of 738 678 is not an integer, and therefore 738 678 is not a square number.
The square of a number (here 738 678) is the result of the product of this number (738 678) by itself (i.e., 738 678 × 738 678); the square of 738 678 is sometimes called "raising 738 678 to the power 2", or "738 678 squared".
The square of 738 678 is 545 645 187 684 because 738 678 × 738 678 = 738 6782 = 545 645 187 684.
As a consequence, 738 678 is the square root of 545 645 187 684.
The multiples of 738 678 are all integers evenly divisible by 738 678, that is all numbers such that the remainder of the division by 738 678 is zero. There are infinitely many multiples of 738 678. The smallest multiples of 738 678 are: