It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 340 804 is not a prime number.
For example, 340 804 can be divided by 2: 340 804 / 2 = 170 402.
For 340 804 to be a prime number, it would have been required that 340 804 has only two divisors, i.e., itself and 1.
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340 804 is an even number, because it is evenly divisible by 2: 340 804 / 2 = 170 402.
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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 340 804 is about 583.784.
Thus, the square root of 340 804 is not an integer, and therefore 340 804 is not a square number.
The square of a number (here 340 804) is the result of the product of this number (340 804) by itself (i.e., 340 804 × 340 804); the square of 340 804 is sometimes called "raising 340 804 to the power 2", or "340 804 squared".
The square of 340 804 is 116 147 366 416 because 340 804 × 340 804 = 340 8042 = 116 147 366 416.
As a consequence, 340 804 is the square root of 116 147 366 416.
The multiples of 340 804 are all integers evenly divisible by 340 804, that is all numbers such that the remainder of the division by 340 804 is zero. There are infinitely many multiples of 340 804. The smallest multiples of 340 804 are: