286389 has 8 divisors (see below), whose sum is σ = 424320. Its totient is φ = 190908.

The previous prime is 286381. The next prime is 286393. The reversal of 286389 is 983682.

286389 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 286389 - 2³ = 286381 is a prime.

286389 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (286381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5277 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (53040).

2²⁸⁶³⁸⁹ is an apocalyptic number.

It is an amenable number.

286389 is a deficient number, since it is larger than the sum of its proper divisors (137931).

286389 is a wasteful number, since it uses less digits than its factorization.

286389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616 (or 10610 counting only the distinct ones).

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

The square root of 286389 is about 535.1532490792. The cubic root of 286389 is about 65.9151802971.

The spelling of 286389 in words is "two hundred eighty-six thousand, three hundred eighty-nine".