It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 804 008 is not a prime number.
For example, 804 008 can be divided by 2: 804 008 / 2 = 402 004.
For 804 008 to be a prime number, it would have been required that 804 008 has only two divisors, i.e., itself and 1.
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804 008 is an even number, because it is evenly divisible by 2: 804 008 / 2 = 402 004.
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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 804 008 is about 896.665.
Thus, the square root of 804 008 is not an integer, and therefore 804 008 is not a square number.
The square of a number (here 804 008) is the result of the product of this number (804 008) by itself (i.e., 804 008 × 804 008); the square of 804 008 is sometimes called "raising 804 008 to the power 2", or "804 008 squared".
The square of 804 008 is 646 428 864 064 because 804 008 × 804 008 = 804 0082 = 646 428 864 064.
As a consequence, 804 008 is the square root of 646 428 864 064.
The multiples of 804 008 are all integers evenly divisible by 804 008, that is all numbers such that the remainder of the division by 804 008 is zero. There are infinitely many multiples of 804 008. The smallest multiples of 804 008 are: