285956 has 24 divisors (see below), whose sum is σ = 559776. Its totient is φ = 126720.

The previous prime is 285953. The next prime is 285977. The reversal of 285956 is 659582.

285956 = T₂₃ + T₂₄ + ... + T₁₁₉.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (285953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2900 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (23324).

2²⁸⁵⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

285956 is a deficient number, since it is larger than the sum of its proper divisors (273820).

285956 is a wasteful number, since it uses less digits than its factorization.

285956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 177 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

The square root of 285956 is about 534.7485390349. The cubic root of 285956 is about 65.8819438375.

It can be divided in two parts, 2 and 85956, that added together give a palindrome (85958).

The spelling of 285956 in words is "two hundred eighty-five thousand, nine hundred fifty-six".