It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 242 076 is not a prime number.
For example, 402 242 076 can be divided by 2: 402 242 076 / 2 = 201 121 038.
For 402 242 076 to be a prime number, it would have been required that 402 242 076 has only two divisors, i.e., itself and 1.
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402 242 076 is an even number, because it is evenly divisible by 2: 402 242 076 / 2 = 201 121 038.
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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 402 242 076 is about 20 055.974.
Thus, the square root of 402 242 076 is not an integer, and therefore 402 242 076 is not a square number.
The square of a number (here 402 242 076) is the result of the product of this number (402 242 076) by itself (i.e., 402 242 076 × 402 242 076); the square of 402 242 076 is sometimes called "raising 402 242 076 to the power 2", or "402 242 076 squared".
The square of 402 242 076 is 161 798 687 704 789 760 because 402 242 076 × 402 242 076 = 402 242 0762 = 161 798 687 704 789 760.
As a consequence, 402 242 076 is the square root of 161 798 687 704 789 760.
402 242 076 is a number with 9 digits.
The multiples of 402 242 076 are all integers evenly divisible by 402 242 076, that is all numbers such that the remainder of the division by 402 242 076 is zero. There are infinitely many multiples of 402 242 076. The smallest multiples of 402 242 076 are: