Is 1800 a prime number?

1 800 is an even number, because it is evenly divisible by 2: 1 800 / 2 = 900.

Find out more:

• 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 1 800 is about 42.426.

Thus, the square root of 1 800 is not an integer, and therefore 1 800 is not a square number.

The square of a number (here 1 800) is the result of the product of this number (1 800) by itself (i.e., 1 800 × 1 800); the square of 1 800 is sometimes called "raising 1 800 to the power 2", or "1 800 squared".

The square of 1 800 is 3 240 000 because 1 800 × 1 800 = 1 800² = 3 240 000.

As a consequence, 1 800 is the square root of 3 240 000.

1 800 is a number with 4 digits.

The multiples of 1 800 are all integers evenly divisible by 1 800, that is all numbers such that the remainder of the division by 1 800 is zero. There are infinitely many multiples of 1 800. The smallest multiples of 1 800 are:

• 0: indeed, 0 is divisible by any natural number, and it is thus a multiple of 1 800 too, since 0 × 1 800 = 0
• 1 800: indeed, 1 800 is a multiple of itself, since 1 800 is evenly divisible by 1 800 (we have 1 800 / 1 800 = 1, so the remainder of this division is indeed zero)
• 3 600: indeed, 3 600 = 1 800 × 2
• 5 400: indeed, 5 400 = 1 800 × 3
• 7 200: indeed, 7 200 = 1 800 × 4
• 9 000: indeed, 9 000 = 1 800 × 5
• etc.

• Preceding numbers: …1 798, 1 799
• Following numbers: 1 801, 1 802…

Nearest numbers from 1 800

• Preceding prime number: 1 789
• Following prime number: 1 801

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• 1 800 est-il un nombre premier ?