720764 has 12 divisors (see below), whose sum is σ = 1376088. Its totient is φ = 327600.

The previous prime is 720763. The next prime is 720767. The reversal of 720764 is 467027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8147 + ... + 8234.

It is an arithmetic number, because the mean of its divisors is an integer number (114674).

2⁷²⁰⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

720764 is a deficient number, since it is larger than the sum of its proper divisors (655324).

720764 is a wasteful number, since it uses less digits than its factorization.

720764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16396 (or 16394 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 720764 is about 848.9782093788. The cubic root of 720764 is about 89.6597855138.

The spelling of 720764 in words is "seven hundred twenty thousand, seven hundred sixty-four".