720681608 has 16 divisors (see below), whose sum is σ = 1368384000. Its totient is φ = 355779216.

The previous prime is 720681587. The next prime is 720681631. The reversal of 720681608 is 806186027.

720681608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569528 + ... + 570791.

It is an arithmetic number, because the mean of its divisors is an integer number (85524000).

Almost surely, 2^720681608 is an apocalyptic number.

It is an amenable number.

720681608 is a deficient number, since it is larger than the sum of its proper divisors (647702392).

720681608 is a wasteful number, since it uses less digits than its factorization.

720681608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140404 (or 1140400 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 720681608 is about 26845.5137406607. The cubic root of 720681608 is about 896.5636898612.

The spelling of 720681608 in words is "seven hundred twenty million, six hundred eighty-one thousand, six hundred eight".