720320976 has 30 divisors (see below), whose sum is σ = 2015898690. Its totient is φ = 240106944.

The previous prime is 720320963. The next prime is 720320977. The reversal of 720320976 is 679023027.

It can be written as a sum of positive squares in only one way, i.e., 633830976 + 86490000 = 25176^2 + 9300^2 .

It is a super-3 number, since 3×720320976³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 720320976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720320977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2500971 + ... + 2501258.

It is an arithmetic number, because the mean of its divisors is an integer number (67196623).

Almost surely, 2^720320976 is an apocalyptic number.

It is an amenable number.

720320976 is an abundant number, since it is smaller than the sum of its proper divisors (1295577714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720320976 is a wasteful number, since it uses less digits than its factorization.

720320976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002243 (or 5002234 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 720320976 is about 26838.7960981859. The cubic root of 720320976 is about 896.4141168738.

The spelling of 720320976 in words is "seven hundred twenty million, three hundred twenty thousand, nine hundred seventy-six".