285788 has 12 divisors (see below), whose sum is σ = 513912. Its totient is φ = 138960.

The previous prime is 285781. The next prime is 285823. The reversal of 285788 is 887582.

285788 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285781) by changing a digit.

285788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818 + ... + 1113.

It is an arithmetic number, because the mean of its divisors is an integer number (42826).

2²⁸⁵⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

285788 is a deficient number, since it is larger than the sum of its proper divisors (228124).

285788 is a wasteful number, since it uses less digits than its factorization.

285788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972 (or 1970 counting only the distinct ones).

The product of its digits is 35840, while the sum is 38.

The square root of 285788 is about 534.5914327783. The cubic root of 285788 is about 65.8690393641.

The spelling of 285788 in words is "two hundred eighty-five thousand, seven hundred eighty-eight".