685518704 has 40 divisors (see below), whose sum is σ = 1479696960. Its totient is φ = 305480448.

The previous prime is 685518697. The next prime is 685518731. The reversal of 685518704 is 407815586.

It is a happy number.

685518704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50792 + ... + 62855.

It is an arithmetic number, because the mean of its divisors is an integer number (36992424).

Almost surely, 2^685518704 is an apocalyptic number.

It is an amenable number.

685518704 is an abundant number, since it is smaller than the sum of its proper divisors (794178256).

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

685518704 is a wasteful number, since it uses less digits than its factorization.

685518704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113697 (or 113691 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 685518704 is about 26182.4121119503. The cubic root of 685518704 is about 881.7384298815.

The spelling of 685518704 in words is "six hundred eighty-five million, five hundred eighteen thousand, seven hundred four".