686343686 has 64 divisors (see below), whose sum is σ = 1281744000. Its totient is φ = 274563072.

The previous prime is 686343661. The next prime is 686343719.

686343686 is nontrivially palindromic in base 10.

Its product of digits (2985984) is a multiple of the sum of its prime divisors (512).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2670470 + ... + 2670726.

It is an arithmetic number, because the mean of its divisors is an integer number (20027250).

Almost surely, 2^686343686 is an apocalyptic number.

686343686 is a deficient number, since it is larger than the sum of its proper divisors (595400314).

686343686 is a wasteful number, since it uses less digits than its factorization.

686343686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 512 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 50.

The square root of 686343686 is about 26198.1618820863. The cubic root of 686343686 is about 882.0919951074.

The spelling of 686343686 in words is "six hundred eighty-six million, three hundred forty-three thousand, six hundred eighty-six".