285535239 has 16 divisors (see below), whose sum is σ = 416755584. Its totient is φ = 172455200.

The previous prime is 285535223. The next prime is 285535267. The reversal of 285535239 is 932535582.

It is a cyclic number.

It is not a de Polignac number, because 285535239 - 2⁴ = 285535223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285535239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285535219) 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 15 ways as a sum of consecutive naturals, for example, 5097 + ... + 24434.

It is an arithmetic number, because the mean of its divisors is an integer number (26047224).

Almost surely, 2^285535239 is an apocalyptic number.

285535239 is a deficient number, since it is larger than the sum of its proper divisors (131220345).

285535239 is a wasteful number, since it uses less digits than its factorization.

285535239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29838.

The product of its digits is 324000, while the sum is 42.

The square root of 285535239 is about 16897.7879913319. The cubic root of 285535239 is about 658.4961466812.

The spelling of 285535239 in words is "two hundred eighty-five million, five hundred thirty-five thousand, two hundred thirty-nine".