It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 464 is not a prime number.
For example, 402 464 can be divided by 2: 402 464 / 2 = 201 232.
For 402 464 to be a prime number, it would have been required that 402 464 has only two divisors, i.e., itself and 1.
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402 464 is an even number, because it is evenly divisible by 2: 402 464 / 2 = 201 232.
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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 402 464 is about 634.401.
Thus, the square root of 402 464 is not an integer, and therefore 402 464 is not a square number.
The square of a number (here 402 464) is the result of the product of this number (402 464) by itself (i.e., 402 464 × 402 464); the square of 402 464 is sometimes called "raising 402 464 to the power 2", or "402 464 squared".
The square of 402 464 is 161 977 271 296 because 402 464 × 402 464 = 402 4642 = 161 977 271 296.
As a consequence, 402 464 is the square root of 161 977 271 296.
The multiples of 402 464 are all integers evenly divisible by 402 464, that is all numbers such that the remainder of the division by 402 464 is zero. There are infinitely many multiples of 402 464. The smallest multiples of 402 464 are: