285136 has 20 divisors (see below), whose sum is σ = 562464. Its totient is φ = 140000.

The previous prime is 285121. The next prime is 285139. The reversal of 285136 is 631582.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 285136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285139) 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, 1011 + ... + 1261.

2²⁸⁵¹³⁶ is an apocalyptic number.

It is an amenable number.

285136 is a deficient number, since it is larger than the sum of its proper divisors (277328).

285136 is a wasteful number, since it uses less digits than its factorization.

285136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 324 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 285136 is about 533.9812730799. The cubic root of 285136 is about 65.8189097636.

The spelling of 285136 in words is "two hundred eighty-five thousand, one hundred thirty-six".