686358984 has 16 divisors (see below), whose sum is σ = 1715897520. Its totient is φ = 228786320.

The previous prime is 686358973. The next prime is 686358997. The reversal of 686358984 is 489853686.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14299122 + ... + 14299169.

It is an arithmetic number, because the mean of its divisors is an integer number (107243595).

Almost surely, 2^686358984 is an apocalyptic number.

It is an amenable number.

686358984 is an abundant number, since it is smaller than the sum of its proper divisors (1029538536).

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

686358984 is a wasteful number, since it uses less digits than its factorization.

686358984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28598300 (or 28598296 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The square root of 686358984 is about 26198.4538475079. The cubic root of 686358984 is about 882.0985487449.

The spelling of 686358984 in words is "six hundred eighty-six million, three hundred fifty-eight thousand, nine hundred eighty-four".