685934872 has 16 divisors (see below), whose sum is σ = 1469860560. Its totient is φ = 293972064.

The previous prime is 685934867. The next prime is 685934933. The reversal of 685934872 is 278439586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6124363 + ... + 6124474.

It is an arithmetic number, because the mean of its divisors is an integer number (91866285).

Almost surely, 2^685934872 is an apocalyptic number.

It is an amenable number.

685934872 is an abundant number, since it is smaller than the sum of its proper divisors (783925688).

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

685934872 is a wasteful number, since it uses less digits than its factorization.

685934872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12248850 (or 12248846 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 685934872 is about 26190.3583786095. The cubic root of 685934872 is about 881.9168237920.

The spelling of 685934872 in words is "six hundred eighty-five million, nine hundred thirty-four thousand, eight hundred seventy-two".