864642886 has 8 divisors (see below), whose sum is σ = 1338801984. Its totient is φ = 418375560.

The previous prime is 864642871. The next prime is 864642907. The reversal of 864642886 is 688246468.

864642886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 6972865 + ... + 6972988.

It is an arithmetic number, because the mean of its divisors is an integer number (167350248).

Almost surely, 2^864642886 is an apocalyptic number.

864642886 is a deficient number, since it is larger than the sum of its proper divisors (474159098).

864642886 is a wasteful number, since it uses less digits than its factorization.

864642886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945886.

The product of its digits is 3538944, while the sum is 52.

The square root of 864642886 is about 29404.8105928265. The cubic root of 864642886 is about 952.6768036118.

The spelling of 864642886 in words is "eight hundred sixty-four million, six hundred forty-two thousand, eight hundred eighty-six".