686576982 has 64 divisors (see below), whose sum is σ = 1718760960. Its totient is φ = 177997824.

The previous prime is 686576963. The next prime is 686577013. The reversal of 686576982 is 289675686.

686576982 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, 21558 + ... + 42870.

It is an arithmetic number, because the mean of its divisors is an integer number (26855640).

Almost surely, 2^686576982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686576982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859380480).

686576982 is an abundant number, since it is smaller than the sum of its proper divisors (1032183978).

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

686576982 is a wasteful number, since it uses less digits than its factorization.

686576982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21397.

The product of its digits is 8709120, while the sum is 57.

The square root of 686576982 is about 26202.6140299017. The cubic root of 686576982 is about 882.1919281420.

The spelling of 686576982 in words is "six hundred eighty-six million, five hundred seventy-six thousand, nine hundred eighty-two".