285220112 has 20 divisors (see below), whose sum is σ = 552983580. Its totient is φ = 142514688.

The previous prime is 285220097. The next prime is 285220123. The reversal of 285220112 is 211022582.

It can be written as a sum of positive squares in 2 ways, for example, as 129868816 + 155351296 = 11396^2 + 12464^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22964 + ... + 33132.

It is an arithmetic number, because the mean of its divisors is an integer number (27649179).

Almost surely, 2^285220112 is an apocalyptic number.

It is an amenable number.

285220112 is a deficient number, since it is larger than the sum of its proper divisors (267763468).

285220112 is a wasteful number, since it uses less digits than its factorization.

285220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11930 (or 11924 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 285220112 is about 16888.4609127060. The cubic root of 285220112 is about 658.2538108008.

Adding to 285220112 its reverse (211022582), we get a palindrome (496242694).

The spelling of 285220112 in words is "two hundred eighty-five million, two hundred twenty thousand, one hundred twelve".