285133156 has 60 divisors (see below), whose sum is σ = 635266800. Its totient is φ = 111049680.

The previous prime is 285133117. The next prime is 285133157. The reversal of 285133156 is 651331582.

It is not an unprimeable number, because it can be changed into a prime (285133157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104295 + ... + 106993.

It is an arithmetic number, because the mean of its divisors is an integer number (10587780).

Almost surely, 2^285133156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 285133156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317633400).

285133156 is an abundant number, since it is smaller than the sum of its proper divisors (350133644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285133156 is a wasteful number, since it uses less digits than its factorization.

285133156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742 (or 2719 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 285133156 is about 16885.8862959573. The cubic root of 285133156 is about 658.1869093286.

It can be divided in two parts, 2 and 85133156, that added together give a palindrome (85133158).

The spelling of 285133156 in words is "two hundred eighty-five million, one hundred thirty-three thousand, one hundred fifty-six".