It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 78 402 002 is not a prime number.
For example, 78 402 002 can be divided by 2: 78 402 002 / 2 = 39 201 001.
For 78 402 002 to be a prime number, it would have been required that 78 402 002 has only two divisors, i.e., itself and 1.
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78 402 002 is an even number, because it is evenly divisible by 2: 78 402 002 / 2 = 39 201 001.
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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 78 402 002 is about 8 854.490.
Thus, the square root of 78 402 002 is not an integer, and therefore 78 402 002 is not a square number.
The square of a number (here 78 402 002) is the result of the product of this number (78 402 002) by itself (i.e., 78 402 002 × 78 402 002); the square of 78 402 002 is sometimes called "raising 78 402 002 to the power 2", or "78 402 002 squared".
The square of 78 402 002 is 6 146 873 917 608 004 because 78 402 002 × 78 402 002 = 78 402 0022 = 6 146 873 917 608 004.
As a consequence, 78 402 002 is the square root of 6 146 873 917 608 004.
78 402 002 is a number with 8 digits.
The multiples of 78 402 002 are all integers evenly divisible by 78 402 002, that is all numbers such that the remainder of the division by 78 402 002 is zero. There are infinitely many multiples of 78 402 002. The smallest multiples of 78 402 002 are: