686632836 has 24 divisors (see below), whose sum is σ = 1628409664. Its totient is φ = 225125280.

The previous prime is 686632813. The next prime is 686632841. The reversal of 686632836 is 638236686.

686632836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 468280 + ... + 469743.

Almost surely, 2^686632836 is an apocalyptic number.

It is an amenable number.

686632836 is an abundant number, since it is smaller than the sum of its proper divisors (941776828).

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

686632836 is a wasteful number, since it uses less digits than its factorization.

686632836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938091 (or 938089 counting only the distinct ones).

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

The square root of 686632836 is about 26203.6798179187. The cubic root of 686632836 is about 882.2158500100.

The spelling of 686632836 in words is "six hundred eighty-six million, six hundred thirty-two thousand, eight hundred thirty-six".