688804 has 12 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 329384.

The previous prime is 688799. The next prime is 688813. The reversal of 688804 is 408886.

It is a self number, because there is not a number n which added to its sum of digits gives 688804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3652 + ... + 3835.

It is an arithmetic number, because the mean of its divisors is an integer number (104832).

2⁶⁸⁸⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

688804 is a deficient number, since it is larger than the sum of its proper divisors (569180).

688804 is a wasteful number, since it uses less digits than its factorization.

688804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7514 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 688804 is about 829.9421666598. The cubic root of 688804 is about 88.3144740403.

The spelling of 688804 in words is "six hundred eighty-eight thousand, eight hundred four".