868600656 has 540 divisors, whose sum is σ = 3360749184. Its totient is φ = 206841600.

The previous prime is 868600651. The next prime is 868600657. The reversal of 868600656 is 656006868.

868600656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868600651) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 28019361 + ... + 28019391.

Almost surely, 2^868600656 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 868600656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1680374592).

868600656 is an abundant number, since it is smaller than the sum of its proper divisors (2492148528).

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

868600656 is a wasteful number, since it uses less digits than its factorization.

868600656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 868600656 is about 29472.0317589405. The cubic root of 868600656 is about 954.1281686376.

The spelling of 868600656 in words is "eight hundred sixty-eight million, six hundred thousand, six hundred fifty-six".