686116828 has 24 divisors (see below), whose sum is σ = 1271491200. Its totient is φ = 323050608.

The previous prime is 686116819. The next prime is 686116843. The reversal of 686116828 is 828611686.

It is a congruent number.

It is an unprimeable number.

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, 14338 + ... + 39721.

It is an arithmetic number, because the mean of its divisors is an integer number (52978800).

Almost surely, 2^686116828 is an apocalyptic number.

It is an amenable number.

686116828 is a deficient number, since it is larger than the sum of its proper divisors (585374372).

686116828 is a wasteful number, since it uses less digits than its factorization.

686116828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54249 (or 54247 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 686116828 is about 26193.8318693543. The cubic root of 686116828 is about 881.9947980901.

The spelling of 686116828 in words is "six hundred eighty-six million, one hundred sixteen thousand, eight hundred twenty-eight".