285685663 has 8 divisors (see below), whose sum is σ = 309869280. Its totient is φ = 262321920.

The previous prime is 285685651. The next prime is 285685667. The reversal of 285685663 is 366586582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285685663 - 2¹³ = 285677471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285685667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204243 + ... + 205636.

It is an arithmetic number, because the mean of its divisors is an integer number (38733660).

Almost surely, 2^285685663 is an apocalyptic number.

285685663 is a deficient number, since it is larger than the sum of its proper divisors (24183617).

285685663 is a wasteful number, since it uses less digits than its factorization.

285685663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409937.

The product of its digits is 2073600, while the sum is 49.

The square root of 285685663 is about 16902.2384020579. The cubic root of 285685663 is about 658.6117614071.

The spelling of 285685663 in words is "two hundred eighty-five million, six hundred eighty-five thousand, six hundred sixty-three".