686366628 has 24 divisors (see below), whose sum is σ = 1601947200. Its totient is φ = 228728160.

The previous prime is 686366623. The next prime is 686366651. The reversal of 686366628 is 826663686.

686366628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (686366623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79273 + ... + 87503.

It is an arithmetic number, because the mean of its divisors is an integer number (66747800).

Almost surely, 2^686366628 is an apocalyptic number.

It is an amenable number.

686366628 is an abundant number, since it is smaller than the sum of its proper divisors (915580572).

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

686366628 is a wasteful number, since it uses less digits than its factorization.

686366628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15187 (or 15185 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 51.

The square root of 686366628 is about 26198.5997335735. The cubic root of 686366628 is about 882.1018233852.

The spelling of 686366628 in words is "six hundred eighty-six million, three hundred sixty-six thousand, six hundred twenty-eight".