285706 has 8 divisors (see below), whose sum is σ = 447264. Its totient is φ = 136620.

The previous prime is 285697. The next prime is 285707. The reversal of 285706 is 607582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (285707) 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 3 ways as a sum of consecutive naturals, for example, 3060 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (55908).

2²⁸⁵⁷⁰⁶ is an apocalyptic number.

285706 is a deficient number, since it is larger than the sum of its proper divisors (161558).

285706 is a wasteful number, since it uses less digits than its factorization.

285706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 285706 is about 534.5147331926. The cubic root of 285706 is about 65.8627389154.

The spelling of 285706 in words is "two hundred eighty-five thousand, seven hundred six".