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In addition we can say of the number **790 that it is even**

790 is an even number, as it is divisible by 2 : 790/2 = 395

The factors for 790 are all the numbers between -790 and 790 , which divide 790 without leaving any remainder. Since 790 divided by -790 is an integer, -790 is a factor of 790 .

Since 790 divided by -790 is a whole number, -790 is a factor of 790

Since 790 divided by -395 is a whole number, -395 is a factor of 790

Since 790 divided by -158 is a whole number, -158 is a factor of 790

Since 790 divided by -79 is a whole number, -79 is a factor of 790

Since 790 divided by -10 is a whole number, -10 is a factor of 790

Since 790 divided by -5 is a whole number, -5 is a factor of 790

Since 790 divided by -2 is a whole number, -2 is a factor of 790

Since 790 divided by -1 is a whole number, -1 is a factor of 790

Since 790 divided by 1 is a whole number, 1 is a factor of 790

Since 790 divided by 2 is a whole number, 2 is a factor of 790

Since 790 divided by 5 is a whole number, 5 is a factor of 790

Since 790 divided by 10 is a whole number, 10 is a factor of 790

Since 790 divided by 79 is a whole number, 79 is a factor of 790

Since 790 divided by 158 is a whole number, 158 is a factor of 790

Since 790 divided by 395 is a whole number, 395 is a factor of 790

Multiples of 790 are all integers divisible by 790 , i.e. the remainder of the full division by 790 is zero. There are infinite multiples of 790. The smallest multiples of 790 are:

0 : in fact, 0 is divisible by any integer, so it is also a multiple of 790 since 0 × 790 = 0

790 : in fact, 790 is a multiple of itself, since 790 is divisible by 790 (it was 790 / 790 = 1, so the rest of this division is zero)

etc.

It is possible to determine using mathematical techniques whether an integer is prime or not.

for 790, the answer is:
**No, 790 is not a prime number**.

To know the primality of an integer, we can use several algorithms. The most naive is to try all divisors below the number you want to know if it is prime (in our case 790). We can already eliminate even numbers bigger than 2 (then 4 , 6 , 8 ...). Besides, we can stop at the square root of the number in question (here 28.107 ). Historically, the Eratosthenes screen (which dates back to Antiquity) uses this technique relatively effectively.

More modern techniques include the Atkin screen, probabilistic tests, or the cyclotomic test.

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