868139156 has 12 divisors (see below), whose sum is σ = 1520440320. Its totient is φ = 433727640.

The previous prime is 868139149. The next prime is 868139171. The reversal of 868139156 is 651931868.

868139156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 868139156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79730 + ... + 89961.

It is an arithmetic number, because the mean of its divisors is an integer number (126703360).

Almost surely, 2^868139156 is an apocalyptic number.

It is an amenable number.

868139156 is a deficient number, since it is larger than the sum of its proper divisors (652301164).

868139156 is a wasteful number, since it uses less digits than its factorization.

868139156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170974 (or 170972 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 868139156 is about 29464.2012618703. The cubic root of 868139156 is about 953.9591580363.

The spelling of 868139156 in words is "eight hundred sixty-eight million, one hundred thirty-nine thousand, one hundred fifty-six".