289638 has 12 divisors (see below), whose sum is σ = 627588. Its totient is φ = 96540.

The previous prime is 289637. The next prime is 289643. The reversal of 289638 is 836982.

289638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8028 + ... + 8063.

It is an arithmetic number, because the mean of its divisors is an integer number (52299).

2²⁸⁹⁶³⁸ is an apocalyptic number.

289638 is an abundant number, since it is smaller than the sum of its proper divisors (337950).

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

289638 is a wasteful number, since it uses less digits than its factorization.

289638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16099 (or 16096 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 289638 is about 538.1802671968. The cubic root of 289638 is about 66.1635064452.

The spelling of 289638 in words is "two hundred eighty-nine thousand, six hundred thirty-eight".