720 (seven hundred [and] twenty) is the natural number following 719 and preceding 721.
It is 6! (6 factorial) and 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.
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.
720 is a 241-gonal 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.