It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 387 988 is not a prime number.
For example, 42 387 988 can be divided by 2: 42 387 988 / 2 = 21 193 994.
For 42 387 988 to be a prime number, it would have been required that 42 387 988 has only two divisors, i.e., itself and 1.
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42 387 988 is an even number, because it is evenly divisible by 2: 42 387 988 / 2 = 21 193 994.
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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 42 387 988 is about 6 510.606.
Thus, the square root of 42 387 988 is not an integer, and therefore 42 387 988 is not a square number.
The square of a number (here 42 387 988) is the result of the product of this number (42 387 988) by itself (i.e., 42 387 988 × 42 387 988); the square of 42 387 988 is sometimes called "raising 42 387 988 to the power 2", or "42 387 988 squared".
The square of 42 387 988 is 1 796 741 526 688 144 because 42 387 988 × 42 387 988 = 42 387 9882 = 1 796 741 526 688 144.
As a consequence, 42 387 988 is the square root of 1 796 741 526 688 144.
42 387 988 is a number with 8 digits.
The multiples of 42 387 988 are all integers evenly divisible by 42 387 988, that is all numbers such that the remainder of the division by 42 387 988 is zero. There are infinitely many multiples of 42 387 988. The smallest multiples of 42 387 988 are: