285685986 has 16 divisors (see below), whose sum is σ = 604982304. Its totient is φ = 89626944.

The previous prime is 285685949. The next prime is 285685999. The reversal of 285685986 is 689586582.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400320 + ... + 1400523.

It is an arithmetic number, because the mean of its divisors is an integer number (37811394).

Almost surely, 2^285685986 is an apocalyptic number.

285685986 is an abundant number, since it is smaller than the sum of its proper divisors (319296318).

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

285685986 is a wasteful number, since it uses less digits than its factorization.

285685986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800865.

The product of its digits is 8294400, while the sum is 57.

The square root of 285685986 is about 16902.2479570026. The cubic root of 285685986 is about 658.6120096187.

The spelling of 285685986 in words is "two hundred eighty-five million, six hundred eighty-five thousand, nine hundred eighty-six".