686335164 has 24 divisors (see below), whose sum is σ = 1653109248. Its totient is φ = 221398320.

The previous prime is 686335151. The next prime is 686335183. The reversal of 686335164 is 461533686.

It is a congruent 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, 922122 + ... + 922865.

It is an arithmetic number, because the mean of its divisors is an integer number (68879552).

Almost surely, 2^686335164 is an apocalyptic number.

It is an amenable number.

686335164 is an abundant number, since it is smaller than the sum of its proper divisors (966774084).

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

686335164 is a wasteful number, since it uses less digits than its factorization.

686335164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845025 (or 1845023 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 686335164 is about 26197.9992365829. Note that the first 3 decimals coincide. The cubic root of 686335164 is about 882.0883442547.

The spelling of 686335164 in words is "six hundred eighty-six million, three hundred thirty-five thousand, one hundred sixty-four".