687680044 has 12 divisors (see below), whose sum is σ = 1232792568. Its totient is φ = 335453600.

The previous prime is 687680033. The next prime is 687680047. The reversal of 687680044 is 440086786.

687680044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (687680047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096422 + ... + 2096749.

It is an arithmetic number, because the mean of its divisors is an integer number (102732714).

Almost surely, 2^687680044 is an apocalyptic number.

It is an amenable number.

687680044 is a deficient number, since it is larger than the sum of its proper divisors (545112524).

687680044 is a wasteful number, since it uses less digits than its factorization.

687680044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193216 (or 4193214 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 687680044 is about 26223.6542838713. The cubic root of 687680044 is about 882.6641217173.

The spelling of 687680044 in words is "six hundred eighty-seven million, six hundred eighty thousand, forty-four".