It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 400 671 422 is not a prime number.
For example, 400 671 422 can be divided by 2: 400 671 422 / 2 = 200 335 711.
For 400 671 422 to be a prime number, it would have been required that 400 671 422 has only two divisors, i.e., itself and 1.
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400 671 422 is an even number, because it is evenly divisible by 2: 400 671 422 / 2 = 200 335 711.
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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 400 671 422 is about 20 016.779.
Thus, the square root of 400 671 422 is not an integer, and therefore 400 671 422 is not a square number.
The square of a number (here 400 671 422) is the result of the product of this number (400 671 422) by itself (i.e., 400 671 422 × 400 671 422); the square of 400 671 422 is sometimes called "raising 400 671 422 to the power 2", or "400 671 422 squared".
The square of 400 671 422 is 160 537 588 407 502 080 because 400 671 422 × 400 671 422 = 400 671 4222 = 160 537 588 407 502 080.
As a consequence, 400 671 422 is the square root of 160 537 588 407 502 080.
400 671 422 is a number with 9 digits.
The multiples of 400 671 422 are all integers evenly divisible by 400 671 422, that is all numbers such that the remainder of the division by 400 671 422 is zero. There are infinitely many multiples of 400 671 422. The smallest multiples of 400 671 422 are: