720 (number)
720 is the natural number following 719 and preceding 721.
It is 6!, 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 φ = 720, more than any integer below it, making 720 a highly totient number.
720 is a 241-gonal number.In other fields
720 is:
For the year AD, see 720.
