It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 408 429 538 is not a prime number.
For example, 408 429 538 can be divided by 2: 408 429 538 / 2 = 204 214 769.
For 408 429 538 to be a prime number, it would have been required that 408 429 538 has only two divisors, i.e., itself and 1.
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408 429 538 is an even number, because it is evenly divisible by 2: 408 429 538 / 2 = 204 214 769.
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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 408 429 538 is about 20 209.640.
Thus, the square root of 408 429 538 is not an integer, and therefore 408 429 538 is not a square number.
The square of a number (here 408 429 538) is the result of the product of this number (408 429 538) by itself (i.e., 408 429 538 × 408 429 538); the square of 408 429 538 is sometimes called "raising 408 429 538 to the power 2", or "408 429 538 squared".
The square of 408 429 538 is 166 814 687 510 893 440 because 408 429 538 × 408 429 538 = 408 429 5382 = 166 814 687 510 893 440.
As a consequence, 408 429 538 is the square root of 166 814 687 510 893 440.
408 429 538 is a number with 9 digits.
The multiples of 408 429 538 are all integers evenly divisible by 408 429 538, that is all numbers such that the remainder of the division by 408 429 538 is zero. There are infinitely many multiples of 408 429 538. The smallest multiples of 408 429 538 are: