68720808 has 48 divisors (see below), whose sum is σ = 186045120. Its totient is φ = 21143616.

The previous prime is 68720791. The next prime is 68720819. The reversal of 68720808 is 80802786.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4416 + ... + 12527.

It is an arithmetic number, because the mean of its divisors is an integer number (3875940).

Almost surely, 2^68720808 is an apocalyptic number.

It is an amenable number.

68720808 is an abundant number, since it is smaller than the sum of its proper divisors (117324312).

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

68720808 is a wasteful number, since it uses less digits than its factorization.

68720808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16978 (or 16961 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 68720808 is about 8289.8014451493. The cubic root of 68720808 is about 409.6026449668.

The spelling of 68720808 in words is "sixty-eight million, seven hundred twenty thousand, eight hundred eight".