It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 401 438 is not a prime number.
For example, 401 438 can be divided by 2: 401 438 / 2 = 200 719.
For 401 438 to be a prime number, it would have been required that 401 438 has only two divisors, i.e., itself and 1.
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401 438 is an even number, because it is evenly divisible by 2: 401 438 / 2 = 200 719.
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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 401 438 is about 633.591.
Thus, the square root of 401 438 is not an integer, and therefore 401 438 is not a square number.
The square of a number (here 401 438) is the result of the product of this number (401 438) by itself (i.e., 401 438 × 401 438); the square of 401 438 is sometimes called "raising 401 438 to the power 2", or "401 438 squared".
The square of 401 438 is 161 152 467 844 because 401 438 × 401 438 = 401 4382 = 161 152 467 844.
As a consequence, 401 438 is the square root of 161 152 467 844.
The multiples of 401 438 are all integers evenly divisible by 401 438, that is all numbers such that the remainder of the division by 401 438 is zero. There are infinitely many multiples of 401 438. The smallest multiples of 401 438 are: