285205047 has 8 divisors (see below), whose sum is σ = 380580480. Its totient is φ = 189983160.

The previous prime is 285205027. The next prime is 285205051. The reversal of 285205047 is 740502582.

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

It is not a de Polignac number, because 285205047 - 2²⁸ = 16769591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285204999 and 285205017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285205027) 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, 33979 + ... + 41532.

It is an arithmetic number, because the mean of its divisors is an integer number (47572560).

Almost surely, 2^285205047 is an apocalyptic number.

285205047 is a deficient number, since it is larger than the sum of its proper divisors (95375433).

285205047 is a wasteful number, since it uses less digits than its factorization.

285205047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76773.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 285205047 is about 16888.0148922246. The cubic root of 285205047 is about 658.2422211924.

The spelling of 285205047 in words is "two hundred eighty-five million, two hundred five thousand, forty-seven".