864744 has 32 divisors (see below), whose sum is σ = 2185920. Its totient is φ = 285056.

The previous prime is 864737. The next prime is 864757. The reversal of 864744 is 447468.

864744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864744.

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, 3157 + ... + 3419.

It is an arithmetic number, because the mean of its divisors is an integer number (68310).

2⁸⁶⁴⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

864744 is an abundant number, since it is smaller than the sum of its proper divisors (1321176).

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

864744 is a wasteful number, since it uses less digits than its factorization.

864744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 405 counting only the distinct ones).

The product of its digits is 21504, while the sum is 33.

The square root of 864744 is about 929.9161252500. The cubic root of 864744 is about 95.2713938483.

The spelling of 864744 in words is "eight hundred sixty-four thousand, seven hundred forty-four".