285985934 has 32 divisors (see below), whose sum is σ = 497218176. Its totient is φ = 122181120.

The previous prime is 285985919. The next prime is 285985939. The reversal of 285985934 is 439589582.

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21659 + ... + 32265.

It is an arithmetic number, because the mean of its divisors is an integer number (15538068).

Almost surely, 2^285985934 is an apocalyptic number.

285985934 is a deficient number, since it is larger than the sum of its proper divisors (211232242).

285985934 is a wasteful number, since it uses less digits than its factorization.

285985934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10700.

The product of its digits is 3110400, while the sum is 53.

The square root of 285985934 is about 16911.1186501662. The cubic root of 285985934 is about 658.8424260758.

The spelling of 285985934 in words is "two hundred eighty-five million, nine hundred eighty-five thousand, nine hundred thirty-four".