It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 742 378 is not a prime number.
For example, 489 742 378 can be divided by 2: 489 742 378 / 2 = 244 871 189.
For 489 742 378 to be a prime number, it would have been required that 489 742 378 has only two divisors, i.e., itself and 1.
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489 742 378 is an even number, because it is evenly divisible by 2: 489 742 378 / 2 = 244 871 189.
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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 489 742 378 is about 22 130.124.
Thus, the square root of 489 742 378 is not an integer, and therefore 489 742 378 is not a square number.
The square of a number (here 489 742 378) is the result of the product of this number (489 742 378) by itself (i.e., 489 742 378 × 489 742 378); the square of 489 742 378 is sometimes called "raising 489 742 378 to the power 2", or "489 742 378 squared".
The square of 489 742 378 is 239 847 596 809 094 880 because 489 742 378 × 489 742 378 = 489 742 3782 = 239 847 596 809 094 880.
As a consequence, 489 742 378 is the square root of 239 847 596 809 094 880.
489 742 378 is a number with 9 digits.
The multiples of 489 742 378 are all integers evenly divisible by 489 742 378, that is all numbers such that the remainder of the division by 489 742 378 is zero. There are infinitely many multiples of 489 742 378. The smallest multiples of 489 742 378 are: