It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 26 488 is not a prime number.
For example, 26 488 can be divided by 2: 26 488 / 2 = 13 244.
For 26 488 to be a prime number, it would have been required that 26 488 has only two divisors, i.e., itself and 1.
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26 488 is an even number, because it is evenly divisible by 2: 26 488 / 2 = 13 244.
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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 26 488 is about 162.751.
Thus, the square root of 26 488 is not an integer, and therefore 26 488 is not a square number.
The square of a number (here 26 488) is the result of the product of this number (26 488) by itself (i.e., 26 488 × 26 488); the square of 26 488 is sometimes called "raising 26 488 to the power 2", or "26 488 squared".
The square of 26 488 is 701 614 144 because 26 488 × 26 488 = 26 4882 = 701 614 144.
As a consequence, 26 488 is the square root of 701 614 144.
The multiples of 26 488 are all integers evenly divisible by 26 488, that is all numbers such that the remainder of the division by 26 488 is zero. There are infinitely many multiples of 26 488. The smallest multiples of 26 488 are: