868686870 has 16 divisors (see below), whose sum is σ = 2084848560. Its totient is φ = 231649824.

The previous prime is 868686869. The next prime is 868686877. The reversal of 868686870 is 78686868.

868686870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×868686870² = 1509233756220793800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 868686870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868686877) 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, 14478085 + ... + 14478144.

It is an arithmetic number, because the mean of its divisors is an integer number (130303035).

Almost surely, 2^868686870 is an apocalyptic number.

868686870 is an abundant number, since it is smaller than the sum of its proper divisors (1216161690).

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

868686870 is a wasteful number, since it uses less digits than its factorization.

868686870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28956239.

The product of its (nonzero) digits is 6193152, while the sum is 57.

The square root of 868686870 is about 29473.4943635803. The cubic root of 868686870 is about 954.1597353051.

The spelling of 868686870 in words is "eight hundred sixty-eight million, six hundred eighty-six thousand, eight hundred seventy".