289644 has 12 divisors (see below), whose sum is σ = 675864. Its totient is φ = 96544.

The previous prime is 289643. The next prime is 289657. The reversal of 289644 is 446982.

It is a tau number, because it is divible by the number of its divisors (12).

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289644.

It is not an unprimeable number, because it can be changed into a prime (289643) 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, 12057 + ... + 12080.

It is an arithmetic number, because the mean of its divisors is an integer number (56322).

2²⁸⁹⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

289644 is an abundant number, since it is smaller than the sum of its proper divisors (386220).

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

289644 is a wasteful number, since it uses less digits than its factorization.

289644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24144 (or 24142 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 289644 is about 538.1858415083. The cubic root of 289644 is about 66.1639633124.

The spelling of 289644 in words is "two hundred eighty-nine thousand, six hundred forty-four".