686629916 has 24 divisors (see below), whose sum is σ = 1386862176. Its totient is φ = 291355200.

The previous prime is 686629903. The next prime is 686629921. The reversal of 686629916 is 619926686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118571 + ... + 124226.

It is an arithmetic number, because the mean of its divisors is an integer number (57785924).

Almost surely, 2^686629916 is an apocalyptic number.

It is an amenable number.

686629916 is an abundant number, since it is smaller than the sum of its proper divisors (700232260).

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

686629916 is a wasteful number, since it uses less digits than its factorization.

686629916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242909 (or 242907 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 53.

The square root of 686629916 is about 26203.6241004942. The cubic root of 686629916 is about 882.2145994271.

The spelling of 686629916 in words is "six hundred eighty-six million, six hundred twenty-nine thousand, nine hundred sixteen".