864445866 has 8 divisors (see below), whose sum is σ = 1728891744. Its totient is φ = 288148620.

The previous prime is 864445789. The next prime is 864445867. The reversal of 864445866 is 668544468.

864445866 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.

864445866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (864445867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72037150 + ... + 72037161.

It is an arithmetic number, because the mean of its divisors is an integer number (216111468).

Almost surely, 2^864445866 is an apocalyptic number.

864445866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

864445866 is a wasteful number, since it uses less digits than its factorization.

864445866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144074316.

The product of its digits is 4423680, while the sum is 51.

The square root of 864445866 is about 29401.4602698573. The cubic root of 864445866 is about 952.6044382283.

The spelling of 864445866 in words is "eight hundred sixty-four million, four hundred forty-five thousand, eight hundred sixty-six".