686941056 has 96 divisors (see below), whose sum is σ = 2014220520. Its totient is φ = 224640000.

The previous prime is 686941033. The next prime is 686941063. The reversal of 686941056 is 650149686.

It is a tau number, because it is divible by the number of its divisors (96).

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 11 ways as a sum of consecutive naturals, for example, 55431 + ... + 66681.

Almost surely, 2^686941056 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 686941056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007110260).

686941056 is an abundant number, since it is smaller than the sum of its proper divisors (1327279464).

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

686941056 is a wasteful number, since it uses less digits than its factorization.

686941056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11324 (or 11309 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 686941056 is about 26209.5603931085. The cubic root of 686941056 is about 882.3478351014.

The spelling of 686941056 in words is "six hundred eighty-six million, nine hundred forty-one thousand, fifty-six".