It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 72 028 009 is not a prime number.
For example, 72 028 009 can be divided by 71: 72 028 009 / 71 = 1 014 479.
For 72 028 009 to be a prime number, it would have been required that 72 028 009 has only two divisors, i.e., itself and 1.
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72 028 009 is an odd number, because it is not evenly divisible by 2.
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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 72 028 009 is about 8 486.932.
Thus, the square root of 72 028 009 is not an integer, and therefore 72 028 009 is not a square number.
The square of a number (here 72 028 009) is the result of the product of this number (72 028 009) by itself (i.e., 72 028 009 × 72 028 009); the square of 72 028 009 is sometimes called "raising 72 028 009 to the power 2", or "72 028 009 squared".
The square of 72 028 009 is 5 188 034 080 504 081 because 72 028 009 × 72 028 009 = 72 028 0092 = 5 188 034 080 504 081.
As a consequence, 72 028 009 is the square root of 5 188 034 080 504 081.
72 028 009 is a number with 8 digits.
The multiples of 72 028 009 are all integers evenly divisible by 72 028 009, that is all numbers such that the remainder of the division by 72 028 009 is zero. There are infinitely many multiples of 72 028 009. The smallest multiples of 72 028 009 are: