685956408 has 16 divisors (see below), whose sum is σ = 1714891080. Its totient is φ = 228652128.

The previous prime is 685956379. The next prime is 685956421. The reversal of 685956408 is 804659586.

685956408 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 3 ways as a sum of consecutive naturals, for example, 14290735 + ... + 14290782.

Almost surely, 2^685956408 is an apocalyptic number.

It is an amenable number.

685956408 is an abundant number, since it is smaller than the sum of its proper divisors (1028934672).

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

685956408 is a wasteful number, since it uses less digits than its factorization.

685956408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28581526 (or 28581522 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The square root of 685956408 is about 26190.7695190500. The cubic root of 685956408 is about 881.9260534156.

The spelling of 685956408 in words is "six hundred eighty-five million, nine hundred fifty-six thousand, four hundred eight".