It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 438 416 is not a prime number.
For example, 42 438 416 can be divided by 2: 42 438 416 / 2 = 21 219 208.
For 42 438 416 to be a prime number, it would have been required that 42 438 416 has only two divisors, i.e., itself and 1.
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42 438 416 is an even number, because it is evenly divisible by 2: 42 438 416 / 2 = 21 219 208.
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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 42 438 416 is about 6 514.477.
Thus, the square root of 42 438 416 is not an integer, and therefore 42 438 416 is not a square number.
The square of a number (here 42 438 416) is the result of the product of this number (42 438 416) by itself (i.e., 42 438 416 × 42 438 416); the square of 42 438 416 is sometimes called "raising 42 438 416 to the power 2", or "42 438 416 squared".
The square of 42 438 416 is 1 801 019 152 589 056 because 42 438 416 × 42 438 416 = 42 438 4162 = 1 801 019 152 589 056.
As a consequence, 42 438 416 is the square root of 1 801 019 152 589 056.
42 438 416 is a number with 8 digits.
The multiples of 42 438 416 are all integers evenly divisible by 42 438 416, that is all numbers such that the remainder of the division by 42 438 416 is zero. There are infinitely many multiples of 42 438 416. The smallest multiples of 42 438 416 are: