685806368 has 48 divisors (see below), whose sum is σ = 1530587520. Its totient is φ = 299863296.

The previous prime is 685806343. The next prime is 685806371. The reversal of 685806368 is 863608586.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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, 35480 + ... + 51287.

It is an arithmetic number, because the mean of its divisors is an integer number (31887240).

Almost surely, 2^685806368 is an apocalyptic number.

It is an amenable number.

685806368 is an abundant number, since it is smaller than the sum of its proper divisors (844781152).

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

685806368 is a wasteful number, since it uses less digits than its factorization.

685806368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86809 (or 86801 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The square root of 685806368 is about 26187.9049944817. The cubic root of 685806368 is about 881.8617471747.

The spelling of 685806368 in words is "six hundred eighty-five million, eight hundred six thousand, three hundred sixty-eight".