It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 800 264 is not a prime number.
For example, 800 264 can be divided by 2: 800 264 / 2 = 400 132.
For 800 264 to be a prime number, it would have been required that 800 264 has only two divisors, i.e., itself and 1.
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800 264 is an even number, because it is evenly divisible by 2: 800 264 / 2 = 400 132.
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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 800 264 is about 894.575.
Thus, the square root of 800 264 is not an integer, and therefore 800 264 is not a square number.
The square of a number (here 800 264) is the result of the product of this number (800 264) by itself (i.e., 800 264 × 800 264); the square of 800 264 is sometimes called "raising 800 264 to the power 2", or "800 264 squared".
The square of 800 264 is 640 422 469 696 because 800 264 × 800 264 = 800 2642 = 640 422 469 696.
As a consequence, 800 264 is the square root of 640 422 469 696.
The multiples of 800 264 are all integers evenly divisible by 800 264, that is all numbers such that the remainder of the division by 800 264 is zero. There are infinitely many multiples of 800 264. The smallest multiples of 800 264 are: