686060928 has 384 divisors, whose sum is σ = 2459358720. Its totient is φ = 186126336.

The previous prime is 686060923. The next prime is 686060929. The reversal of 686060928 is 829060686.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686060923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5007676 + ... + 5007812.

It is an arithmetic number, because the mean of its divisors is an integer number (6404580).

Almost surely, 2^686060928 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 686060928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229679360).

686060928 is an abundant number, since it is smaller than the sum of its proper divisors (1773297792).

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

686060928 is a wasteful number, since it uses less digits than its factorization.

686060928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 686060928 is about 26192.7648025175. The cubic root of 686060928 is about 881.9708445173.

The spelling of 686060928 in words is "six hundred eighty-six million, sixty thousand, nine hundred twenty-eight".