720857904 has 80 divisors (see below), whose sum is σ = 2092699392. Its totient is φ = 212154624.

The previous prime is 720857899. The next prime is 720857983. The reversal of 720857904 is 409758027.

It is a super-2 number, since 2×720857904² = 1039272235518546432, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10762 + ... + 39465.

Almost surely, 2^720857904 is an apocalyptic number.

It is an amenable number.

720857904 is an abundant number, since it is smaller than the sum of its proper divisors (1371841488).

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

720857904 is a wasteful number, since it uses less digits than its factorization.

720857904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50274 (or 50268 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 720857904 is about 26848.7970680252. The cubic root of 720857904 is about 896.6367908922.

The spelling of 720857904 in words is "seven hundred twenty million, eight hundred fifty-seven thousand, nine hundred four".