285700085 has 16 divisors (see below), whose sum is σ = 374343552. Its totient is φ = 207595200.

The previous prime is 285700081. The next prime is 285700091. The reversal of 285700085 is 580007582.

It is not a de Polignac number, because 285700085 - 2² = 285700081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285700081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99287 + ... + 102123.

It is an arithmetic number, because the mean of its divisors is an integer number (23396472).

Almost surely, 2^285700085 is an apocalyptic number.

It is an amenable number.

285700085 is a deficient number, since it is larger than the sum of its proper divisors (88643467).

285700085 is a wasteful number, since it uses less digits than its factorization.

285700085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 285700085 is about 16902.6650265572. The cubic root of 285700085 is about 658.6228439128.

The spelling of 285700085 in words is "two hundred eighty-five million, seven hundred thousand, eighty-five".