686588916 has 96 divisors (see below), whose sum is σ = 1830382848. Its totient is φ = 198696960.

The previous prime is 686588897. The next prime is 686588927. The reversal of 686588916 is 619885686.

686588916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 217300 + ... + 220436.

It is an arithmetic number, because the mean of its divisors is an integer number (19066488).

Almost surely, 2^686588916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686588916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915191424).

686588916 is an abundant number, since it is smaller than the sum of its proper divisors (1143793932).

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

686588916 is a wasteful number, since it uses less digits than its factorization.

686588916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241 (or 3239 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The square root of 686588916 is about 26202.8417542831. The cubic root of 686588916 is about 882.1970394977.

The spelling of 686588916 in words is "six hundred eighty-six million, five hundred eighty-eight thousand, nine hundred sixteen".