685468872 has 96 divisors (see below), whose sum is σ = 2092994400. Its totient is φ = 207709920.

The previous prime is 685468841. The next prime is 685468937. The reversal of 685468872 is 278864586.

685468872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13023 + ... + 39249.

It is an arithmetic number, because the mean of its divisors is an integer number (21802025).

Almost surely, 2^685468872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685468872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046497200).

685468872 is an abundant number, since it is smaller than the sum of its proper divisors (1407525528).

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

685468872 is a wasteful number, since it uses less digits than its factorization.

685468872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26264 (or 26243 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 685468872 is about 26181.4604634654. The cubic root of 685468872 is about 881.7170641362.

The spelling of 685468872 in words is "six hundred eighty-five million, four hundred sixty-eight thousand, eight hundred seventy-two".