686015706 has 16 divisors (see below), whose sum is σ = 1419343200. Its totient is φ = 220786608.

The previous prime is 686015669. The next prime is 686015717. The reversal of 686015706 is 607510686.

686015706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 1971136 + ... + 1971483.

It is an arithmetic number, because the mean of its divisors is an integer number (88708950).

Almost surely, 2^686015706 is an apocalyptic number.

686015706 is an abundant number, since it is smaller than the sum of its proper divisors (733327494).

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

686015706 is a wasteful number, since it uses less digits than its factorization.

686015706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3942653.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 686015706 is about 26191.9015346347. The cubic root of 686015706 is about 881.9514655961.

The spelling of 686015706 in words is "six hundred eighty-six million, fifteen thousand, seven hundred six".