289385 has 8 divisors (see below), whose sum is σ = 358656. Its totient is φ = 223920.

The previous prime is 289381. The next prime is 289397. The reversal of 289385 is 583982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289385 - 2² = 289381 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 8⁴ + 3⁹ + 9² + 8⁶ + 5⁵ .

It is a Duffinian number.

It is a nialpdrome in base 14.

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 289385.

It is not an unprimeable number, because it can be changed into a prime (289381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779 + ... + 1088.

It is an arithmetic number, because the mean of its divisors is an integer number (44832).

2²⁸⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

289385 is a deficient number, since it is larger than the sum of its proper divisors (69271).

289385 is a wasteful number, since it uses less digits than its factorization.

289385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903.

The product of its digits is 17280, while the sum is 35.

The square root of 289385 is about 537.9451644917. The cubic root of 289385 is about 66.1442361337.

The spelling of 289385 in words is "two hundred eighty-nine thousand, three hundred eighty-five".