285985936 has 40 divisors (see below), whose sum is σ = 574963200. Its totient is φ = 137639040.

The previous prime is 285985919. The next prime is 285985939. The reversal of 285985936 is 639589582.

It is not an unprimeable number, because it can be changed into a prime (285985939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193681 + ... + 195151.

It is an arithmetic number, because the mean of its divisors is an integer number (14374080).

Almost surely, 2^285985936 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 285985936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287481600).

285985936 is an abundant number, since it is smaller than the sum of its proper divisors (288977264).

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

285985936 is a wasteful number, since it uses less digits than its factorization.

285985936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927 (or 1921 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 55.

The square root of 285985936 is about 16911.1187092989. The cubic root of 285985936 is about 658.8424276117.

The spelling of 285985936 in words is "two hundred eighty-five million, nine hundred eighty-five thousand, nine hundred thirty-six".