688835930 has 32 divisors (see below), whose sum is σ = 1253180160. Its totient is φ = 272600640.

The previous prime is 688835929. The next prime is 688835951. The reversal of 688835930 is 39538886.

688835930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424661 + ... + 426279.

It is an arithmetic number, because the mean of its divisors is an integer number (39161880).

Almost surely, 2^688835930 is an apocalyptic number.

688835930 is a deficient number, since it is larger than the sum of its proper divisors (564344230).

688835930 is a wasteful number, since it uses less digits than its factorization.

688835930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 688835930 is about 26245.6840261404. The cubic root of 688835930 is about 883.1583864603.

The spelling of 688835930 in words is "six hundred eighty-eight million, eight hundred thirty-five thousand, nine hundred thirty".