It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 978 is not a prime number.
For example, 40 978 can be divided by 2: 40 978 / 2 = 20 489.
For 40 978 to be a prime number, it would have been required that 40 978 has only two divisors, i.e., itself and 1.
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40 978 is an even number, because it is evenly divisible by 2: 40 978 / 2 = 20 489.
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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 40 978 is about 202.430.
Thus, the square root of 40 978 is not an integer, and therefore 40 978 is not a square number.
The square of a number (here 40 978) is the result of the product of this number (40 978) by itself (i.e., 40 978 × 40 978); the square of 40 978 is sometimes called "raising 40 978 to the power 2", or "40 978 squared".
The square of 40 978 is 1 679 196 484 because 40 978 × 40 978 = 40 9782 = 1 679 196 484.
As a consequence, 40 978 is the square root of 1 679 196 484.
The multiples of 40 978 are all integers evenly divisible by 40 978, that is all numbers such that the remainder of the division by 40 978 is zero. There are infinitely many multiples of 40 978. The smallest multiples of 40 978 are: