720 (number)

720 (seven hundred [and] twenty) is the natural number following 719 and preceding 721.

In mathematics

It is 6! (

720 is expressible as the product of consecutive integers in two different ways: 720 = 1 × 2 × 3 × 4 × 5 × 6 and 720 = 8 × 9 × 10. [2]

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.

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.

References