685227872 has 24 divisors (see below), whose sum is σ = 1541763216. Its totient is φ = 293668992.

The previous prime is 685227841. The next prime is 685227889. The reversal of 685227872 is 278722586.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529303 + ... + 1529750.

It is an arithmetic number, because the mean of its divisors is an integer number (64240134).

Almost surely, 2^685227872 is an apocalyptic number.

It is an amenable number.

685227872 is an abundant number, since it is smaller than the sum of its proper divisors (856535344).

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

685227872 is a wasteful number, since it uses less digits than its factorization.

685227872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059070 (or 3059062 counting only the distinct ones).

The product of its digits is 752640, while the sum is 47.

The square root of 685227872 is about 26176.8575654145. The cubic root of 685227872 is about 881.6137194383.

The spelling of 685227872 in words is "six hundred eighty-five million, two hundred twenty-seven thousand, eight hundred seventy-two".