285906 has 16 divisors (see below), whose sum is σ = 605664. Its totient is φ = 89664.

The previous prime is 285871. The next prime is 285937. The reversal of 285906 is 609582.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 1503.

It is an arithmetic number, because the mean of its divisors is an integer number (37854).

2²⁸⁵⁹⁰⁶ is an apocalyptic number.

285906 is an abundant number, since it is smaller than the sum of its proper divisors (319758).

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

285906 is a wasteful number, since it uses less digits than its factorization.

285906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 285906 is about 534.7017860453. The cubic root of 285906 is about 65.8781037488.

The spelling of 285906 in words is "two hundred eighty-five thousand, nine hundred six".