It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 988 is not a prime number.
For example, 720 988 can be divided by 2: 720 988 / 2 = 360 494.
For 720 988 to be a prime number, it would have been required that 720 988 has only two divisors, i.e., itself and 1.
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720 988 is an even number, because it is evenly divisible by 2: 720 988 / 2 = 360 494.
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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 720 988 is about 849.110.
Thus, the square root of 720 988 is not an integer, and therefore 720 988 is not a square number.
The square of a number (here 720 988) is the result of the product of this number (720 988) by itself (i.e., 720 988 × 720 988); the square of 720 988 is sometimes called "raising 720 988 to the power 2", or "720 988 squared".
The square of 720 988 is 519 823 696 144 because 720 988 × 720 988 = 720 9882 = 519 823 696 144.
As a consequence, 720 988 is the square root of 519 823 696 144.
The multiples of 720 988 are all integers evenly divisible by 720 988, that is all numbers such that the remainder of the division by 720 988 is zero. There are infinitely many multiples of 720 988. The smallest multiples of 720 988 are: