285889 has 8 divisors (see below), whose sum is σ = 308448. Its totient is φ = 264000.

The previous prime is 285871. The next prime is 285937. The reversal of 285889 is 988582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 285889 - 2⁹ = 285377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285839) 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, 1014 + ... + 1264.

It is an arithmetic number, because the mean of its divisors is an integer number (38556).

2²⁸⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

285889 is a deficient number, since it is larger than the sum of its proper divisors (22559).

285889 is a wasteful number, since it uses less digits than its factorization.

285889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its digits is 46080, while the sum is 40.

The square root of 285889 is about 534.6858890975. The cubic root of 285889 is about 65.8767980167.

The spelling of 285889 in words is "two hundred eighty-five thousand, eight hundred eighty-nine".