289404 has 18 divisors (see below), whose sum is σ = 731640. Its totient is φ = 96456.

The previous prime is 289397. The next prime is 289417. The reversal of 289404 is 404982.

It is a tau number, because it is divible by the number of its divisors (18).

It is a zygodrome in base 3.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289404.

It is an unprimeable number.

289404 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3984 + ... + 4055.

2²⁸⁹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

289404 is an abundant number, since it is smaller than the sum of its proper divisors (442236).

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

289404 is a wasteful number, since it uses less digits than its factorization.

289404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8049 (or 8044 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 289404 is about 537.9628239944. The cubic root of 289404 is about 66.1456837012.

The spelling of 289404 in words is "two hundred eighty-nine thousand, four hundred four".