It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 780 464 is not a prime number.
For example, 780 464 can be divided by 2: 780 464 / 2 = 390 232.
For 780 464 to be a prime number, it would have been required that 780 464 has only two divisors, i.e., itself and 1.
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780 464 is an even number, because it is evenly divisible by 2: 780 464 / 2 = 390 232.
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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 780 464 is about 883.439.
Thus, the square root of 780 464 is not an integer, and therefore 780 464 is not a square number.
The square of a number (here 780 464) is the result of the product of this number (780 464) by itself (i.e., 780 464 × 780 464); the square of 780 464 is sometimes called "raising 780 464 to the power 2", or "780 464 squared".
The square of 780 464 is 609 124 055 296 because 780 464 × 780 464 = 780 4642 = 609 124 055 296.
As a consequence, 780 464 is the square root of 609 124 055 296.
The multiples of 780 464 are all integers evenly divisible by 780 464, that is all numbers such that the remainder of the division by 780 464 is zero. There are infinitely many multiples of 780 464. The smallest multiples of 780 464 are: