686833656 has 32 divisors (see below), whose sum is σ = 1718620800. Its totient is φ = 228739680.

The previous prime is 686833619. The next prime is 686833657. The reversal of 686833656 is 656338686.

It is a junction number, because it is equal to n+sod(n) for n = 686833599 and 686833608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686833657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15885 + ... + 40323.

It is an arithmetic number, because the mean of its divisors is an integer number (53706900).

Almost surely, 2^686833656 is an apocalyptic number.

It is an amenable number.

686833656 is an abundant number, since it is smaller than the sum of its proper divisors (1031787144).

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

686833656 is a wasteful number, since it uses less digits than its factorization.

686833656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25619 (or 25615 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The square root of 686833656 is about 26207.5114423327. The cubic root of 686833656 is about 882.3018490615.

The spelling of 686833656 in words is "six hundred eighty-six million, eight hundred thirty-three thousand, six hundred fifty-six".