It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 49 438 is not a prime number.
For example, 49 438 can be divided by 2: 49 438 / 2 = 24 719.
For 49 438 to be a prime number, it would have been required that 49 438 has only two divisors, i.e., itself and 1.
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49 438 is an even number, because it is evenly divisible by 2: 49 438 / 2 = 24 719.
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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 49 438 is about 222.347.
Thus, the square root of 49 438 is not an integer, and therefore 49 438 is not a square number.
The square of a number (here 49 438) is the result of the product of this number (49 438) by itself (i.e., 49 438 × 49 438); the square of 49 438 is sometimes called "raising 49 438 to the power 2", or "49 438 squared".
The square of 49 438 is 2 444 115 844 because 49 438 × 49 438 = 49 4382 = 2 444 115 844.
As a consequence, 49 438 is the square root of 2 444 115 844.
The multiples of 49 438 are all integers evenly divisible by 49 438, that is all numbers such that the remainder of the division by 49 438 is zero. There are infinitely many multiples of 49 438. The smallest multiples of 49 438 are: