720 (seven hundred [and] twenty) is the natural number following 719 and preceding 721.
In mathematics 720 is: 6! (6 factorial). a composite number with 30 divisors, more than any number below, making it the 14th highly composite number. a highly abundant number. a Harshad number in every base from binary to decimal. the smallest number to be palindromic in 16 bases. a 241-gonal number. It is equal to:
two round angles (= 2 × 360). five gross (= 500 duodecimal, 5 × 144).
720 is expressible as the product of consecutive integers in two different ways: and .
There are 49 solutions to the equation , more than any integer below it, making 720 a highly totient number.
In other fields
720 is: A common vertical display resolution for HDTV (see 720p). 720° is two full rotations; the term "720" refers to a skateboarding trick. 720° is also the name of a skateboarding video game. 720 is a dual area code in the Denver Metro Area along with 303. 720° is the sum of all the defects of any polyhedron. 720 is a short form of saying Boeing 720, an airliner which is no longer in service.
For the year AD, see 720.
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