285868 has 24 divisors (see below), whose sum is σ = 559440. Its totient is φ = 126720.

The previous prime is 285841. The next prime is 285871. The reversal of 285868 is 868582.

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, 3168 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (23310).

2²⁸⁵⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

285868 is a deficient number, since it is larger than the sum of its proper divisors (273572).

285868 is a wasteful number, since it uses less digits than its factorization.

285868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 285868 is about 534.6662510389. Note that the first 3 decimals coincide. The cubic root of 285868 is about 65.8751849820.

It can be divided in two parts, 2858 and 68, that added together give a triangular number (2926 = T₇₆).

The spelling of 285868 in words is "two hundred eighty-five thousand, eight hundred sixty-eight".