285165439 has 12 divisors (see below), whose sum is σ = 318068296. Its totient is φ = 254143008.

The previous prime is 285165427. The next prime is 285165443. The reversal of 285165439 is 934561582.

It is not a de Polignac number, because 285165439 - 2⁵ = 285165407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285165395 and 285165404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285165409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2109 + ... + 23974.

Almost surely, 2^285165439 is an apocalyptic number.

285165439 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

285165439 is a deficient number, since it is larger than the sum of its proper divisors (32902857).

285165439 is a wasteful number, since it uses less digits than its factorization.

285165439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26154 (or 26125 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The square root of 285165439 is about 16886.8421855597. The cubic root of 285165439 is about 658.2117485375.

The spelling of 285165439 in words is "two hundred eighty-five million, one hundred sixty-five thousand, four hundred thirty-nine".