It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 704 is not a prime number.
For example, 402 704 can be divided by 2: 402 704 / 2 = 201 352.
For 402 704 to be a prime number, it would have been required that 402 704 has only two divisors, i.e., itself and 1.
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402 704 is an even number, because it is evenly divisible by 2: 402 704 / 2 = 201 352.
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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 402 704 is about 634.590.
Thus, the square root of 402 704 is not an integer, and therefore 402 704 is not a square number.
The square of a number (here 402 704) is the result of the product of this number (402 704) by itself (i.e., 402 704 × 402 704); the square of 402 704 is sometimes called "raising 402 704 to the power 2", or "402 704 squared".
The square of 402 704 is 162 170 511 616 because 402 704 × 402 704 = 402 7042 = 162 170 511 616.
As a consequence, 402 704 is the square root of 162 170 511 616.
The multiples of 402 704 are all integers evenly divisible by 402 704, that is all numbers such that the remainder of the division by 402 704 is zero. There are infinitely many multiples of 402 704. The smallest multiples of 402 704 are: