864678444 has 24 divisors (see below), whose sum is σ = 2305809408. Its totient is φ = 247050960.

The previous prime is 864678427. The next prime is 864678457. The reversal of 864678444 is 444876468.

It is a happy number.

864678444 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 2×864678444² = 1495337623036522272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5146812 + ... + 5146979.

It is an arithmetic number, because the mean of its divisors is an integer number (96075392).

Almost surely, 2^864678444 is an apocalyptic number.

864678444 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

864678444 is an abundant number, since it is smaller than the sum of its proper divisors (1441130964).

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

864678444 is a wasteful number, since it uses less digits than its factorization.

864678444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10293805 (or 10293803 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 51.

The square root of 864678444 is about 29405.4152155687. The cubic root of 864678444 is about 952.6898628828.

The spelling of 864678444 in words is "eight hundred sixty-four million, six hundred seventy-eight thousand, four hundred forty-four".