686808794 has 32 divisors (see below), whose sum is σ = 1230768000. Its totient is φ = 287155680.

The previous prime is 686808739. The next prime is 686808833. The reversal of 686808794 is 497808686.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15917 + ... + 40335.

It is an arithmetic number, because the mean of its divisors is an integer number (38461500).

Almost surely, 2^686808794 is an apocalyptic number.

686808794 is a deficient number, since it is larger than the sum of its proper divisors (543959206).

686808794 is a wasteful number, since it uses less digits than its factorization.

686808794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24483 (or 24469 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The square root of 686808794 is about 26207.0371083799. The cubic root of 686808794 is about 882.2912030809.

The spelling of 686808794 in words is "six hundred eighty-six million, eight hundred eight thousand, seven hundred ninety-four".