688044 has 24 divisors (see below), whose sum is σ = 1835008. Its totient is φ = 196560.

The previous prime is 688031. The next prime is 688063. The reversal of 688044 is 440886.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 688044.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4012 + ... + 4179.

2⁶⁸⁸⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

688044 is an abundant number, since it is smaller than the sum of its proper divisors (1146964).

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

688044 is a wasteful number, since it uses less digits than its factorization.

688044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8205 (or 8203 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 688044 is about 829.4841770643. The cubic root of 688044 is about 88.2819811488.

The spelling of 688044 in words is "six hundred eighty-eight thousand, forty-four".