Seven hundred twenty is the natural number following 719 and preceding 721.

720
Cardinal	Seven hundred and twenty
Ordinal	720th
Factorization	$2^4\; \backslash cdot\; 3^2\; \backslash cdot\; 5$
Roman numeral	DCCXX
Binary	1011010000
Hexadecimal	2D0

It is 6! (6 factorial), a composite number with thirty divisors, more than any number below, making it a highly composite number. It is a Harshad number in every base from binary to decimal.

There are 49 solutions to the equation φ(x) = 720, more than any integer below it, making 720 a highly totient number.

720 is a 241-gonal number.

Divisors

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1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720

Factors

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2, 2, 2, 2, 3, 3, 5

In other fields

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720 is

• A common vertical resolution for HDTV (see 720i and 720p).
• 720 and above is a good credit score.
• 720 degrees equal two rotations; used as a skateboarding trick.

For the year AD, see 720. Integers

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