Is 1640 a prime number?

1 640 is an even number, because it is evenly divisible by 2: 1 640 / 2 = 820.

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• What is an even number?

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 1 640 is about 40.497.

Thus, the square root of 1 640 is not an integer, and therefore 1 640 is not a square number.

The square of a number (here 1 640) is the result of the product of this number (1 640) by itself (i.e., 1 640 × 1 640); the square of 1 640 is sometimes called "raising 1 640 to the power 2", or "1 640 squared".

The square of 1 640 is 2 689 600 because 1 640 × 1 640 = 1 640² = 2 689 600.

As a consequence, 1 640 is the square root of 2 689 600.

1 640 is a number with 4 digits.

The multiples of 1 640 are all integers evenly divisible by 1 640, that is all numbers such that the remainder of the division by 1 640 is zero. There are infinitely many multiples of 1 640. The smallest multiples of 1 640 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 640 too, since 0 × 1 640 = 0
• 1 640: indeed, 1 640 is a multiple of itself, since 1 640 is evenly divisible by 1 640 (we have 1 640 / 1 640 = 1, so the remainder of this division is indeed zero)
• 3 280: indeed, 3 280 = 1 640 × 2
• 4 920: indeed, 4 920 = 1 640 × 3
• 6 560: indeed, 6 560 = 1 640 × 4
• 8 200: indeed, 8 200 = 1 640 × 5
• etc.

• Preceding numbers: …1 638, 1 639
• Following numbers: 1 641, 1 642…

Nearest numbers from 1 640

• Preceding prime number: 1 637
• Following prime number: 1 657

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• 1 640 est-il un nombre premier ?