285811227 has 32 divisors (see below), whose sum is σ = 470722560. Its totient is φ = 170203680.

The previous prime is 285811219. The next prime is 285811249. The reversal of 285811227 is 722118582.

It is not a de Polignac number, because 285811227 - 2³ = 285811219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285811191 and 285811200.

It is not an unprimeable number, because it can be changed into a prime (285811297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2253 + ... + 24014.

It is an arithmetic number, because the mean of its divisors is an integer number (14710080).

Almost surely, 2^285811227 is an apocalyptic number.

285811227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

285811227 is a deficient number, since it is larger than the sum of its proper divisors (184911333).

285811227 is a wasteful number, since it uses less digits than its factorization.

285811227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26320 (or 26314 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 285811227 is about 16905.9524132774. The cubic root of 285811227 is about 658.7082378555.

The spelling of 285811227 in words is "two hundred eighty-five million, eight hundred eleven thousand, two hundred twenty-seven".