686935806 has 16 divisors (see below), whose sum is σ = 1374943248. Its totient is φ = 228800000.

The previous prime is 686935783. The next prime is 686935817. The reversal of 686935806 is 608539686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36195 + ... + 51806.

It is an arithmetic number, because the mean of its divisors is an integer number (85933953).

Almost surely, 2^686935806 is an apocalyptic number.

686935806 is an abundant number, since it is smaller than the sum of its proper divisors (688007442).

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

686935806 is a wasteful number, since it uses less digits than its factorization.

686935806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89307.

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 686935806 is about 26209.4602386238. The cubic root of 686935806 is about 882.3455872919.

The spelling of 686935806 in words is "six hundred eighty-six million, nine hundred thirty-five thousand, eight hundred six".