It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 400 671 484 is not a prime number.
For example, 400 671 484 can be divided by 2: 400 671 484 / 2 = 200 335 742.
For 400 671 484 to be a prime number, it would have been required that 400 671 484 has only two divisors, i.e., itself and 1.
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400 671 484 is an even number, because it is evenly divisible by 2: 400 671 484 / 2 = 200 335 742.
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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 400 671 484 is about 20 016.780.
Thus, the square root of 400 671 484 is not an integer, and therefore 400 671 484 is not a square number.
The square of a number (here 400 671 484) is the result of the product of this number (400 671 484) by itself (i.e., 400 671 484 × 400 671 484); the square of 400 671 484 is sometimes called "raising 400 671 484 to the power 2", or "400 671 484 squared".
The square of 400 671 484 is 160 537 638 090 762 240 because 400 671 484 × 400 671 484 = 400 671 4842 = 160 537 638 090 762 240.
As a consequence, 400 671 484 is the square root of 160 537 638 090 762 240.
400 671 484 is a number with 9 digits.
The multiples of 400 671 484 are all integers evenly divisible by 400 671 484, that is all numbers such that the remainder of the division by 400 671 484 is zero. There are infinitely many multiples of 400 671 484. The smallest multiples of 400 671 484 are: