285872 has 20 divisors (see below), whose sum is σ = 587016. Its totient is φ = 134400.

The previous prime is 285871. The next prime is 285937. The reversal of 285872 is 278582.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285872.

It is not an unprimeable number, because it can be changed into a prime (285871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254 + ... + 797.

2²⁸⁵⁸⁷² is an apocalyptic number.

It is an amenable number.

285872 is an abundant number, since it is smaller than the sum of its proper divisors (301144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285872 is a wasteful number, since it uses less digits than its factorization.

285872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076 (or 1070 counting only the distinct ones).

The product of its digits is 8960, while the sum is 32.

The square root of 285872 is about 534.6699916771. The cubic root of 285872 is about 65.8754922328.

The spelling of 285872 in words is "two hundred eighty-five thousand, eight hundred seventy-two".