686383808 has 28 divisors (see below), whose sum is σ = 1485866472. Its totient is φ = 311992320.

The previous prime is 686383793. The next prime is 686383811. The reversal of 686383808 is 808383686.

It is a super-2 number, since 2×686383808² = 942245463769161728, which contains 22 as substring.

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, 486785 + ... + 488192.

Almost surely, 2^686383808 is an apocalyptic number.

It is an amenable number.

686383808 is an abundant number, since it is smaller than the sum of its proper divisors (799482664).

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

686383808 is a wasteful number, since it uses less digits than its factorization.

686383808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975000 (or 974990 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 686383808 is about 26198.9276116409. The cubic root of 686383808 is about 882.1091830975.

The spelling of 686383808 in words is "six hundred eighty-six million, three hundred eighty-three thousand, eight hundred eight".