720645968 has 40 divisors (see below), whose sum is σ = 1597481088. Its totient is φ = 308506752.

The previous prime is 720645949. The next prime is 720645977. The reversal of 720645968 is 869546027.

720645968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×720645968² = 1038661222389314048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116030 + ... + 122082.

Almost surely, 2^720645968 is an apocalyptic number.

It is an amenable number.

720645968 is an abundant number, since it is smaller than the sum of its proper divisors (876835120).

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

720645968 is a wasteful number, since it uses less digits than its factorization.

720645968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131 (or 7125 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 720645968 is about 26844.8499343915. The cubic root of 720645968 is about 896.5489103080.

The spelling of 720645968 in words is "seven hundred twenty million, six hundred forty-five thousand, nine hundred sixty-eight".