864404 has 12 divisors (see below), whose sum is σ = 1561728. Its totient is φ = 418200.

The previous prime is 864379. The next prime is 864407. The reversal of 864404 is 404468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864407) 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, 3362 + ... + 3609.

It is an arithmetic number, because the mean of its divisors is an integer number (130144).

2⁸⁶⁴⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

864404 is a deficient number, since it is larger than the sum of its proper divisors (697324).

864404 is a wasteful number, since it uses less digits than its factorization.

864404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006 (or 7004 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 864404 is about 929.7332950906. The cubic root of 864404 is about 95.2589059443.

The spelling of 864404 in words is "eight hundred sixty-four thousand, four hundred four".