864004 has 12 divisors (see below), whose sum is σ = 1537228. Its totient is φ = 424800.

The previous prime is 863983. The next prime is 864007. The reversal of 864004 is 400468.

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 705600 = 398^2 + 840^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864007) 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, 1527 + ... + 2014.

2⁸⁶⁴⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

864004 is a deficient number, since it is larger than the sum of its proper divisors (673224).

864004 is a wasteful number, since it uses less digits than its factorization.

864004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606 (or 3604 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 864004 is about 929.5181547447. The cubic root of 864004 is about 95.2442100994.

The spelling of 864004 in words is "eight hundred sixty-four thousand, four".