686323686 has 16 divisors (see below), whose sum is σ = 1419980400. Its totient is φ = 220885728.

The previous prime is 686323669. The next prime is 686323691.

686323686 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1972021 + ... + 1972368.

It is an arithmetic number, because the mean of its divisors is an integer number (88748775).

Almost surely, 2^686323686 is an apocalyptic number.

686323686 is an abundant number, since it is smaller than the sum of its proper divisors (733656714).

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

686323686 is a wasteful number, since it uses less digits than its factorization.

686323686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944423.

The product of its digits is 1492992, while the sum is 48.

The square root of 686323686 is about 26197.7801731368. The cubic root of 686323686 is about 882.0834269942.

The spelling of 686323686 in words is "six hundred eighty-six million, three hundred twenty-three thousand, six hundred eighty-six".