285205134 has 16 divisors (see below), whose sum is σ = 579762000. Its totient is φ = 93509760.

The previous prime is 285205133. The next prime is 285205159. The reversal of 285205134 is 431502582.

It is a super-3 number, since 3×285205134³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285205133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389259 + ... + 389990.

It is an arithmetic number, because the mean of its divisors is an integer number (36235125).

Almost surely, 2^285205134 is an apocalyptic number.

285205134 is an abundant number, since it is smaller than the sum of its proper divisors (294556866).

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

285205134 is a wasteful number, since it uses less digits than its factorization.

285205134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779315.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 285205134 is about 16888.0174680156. The cubic root of 285205134 is about 658.2422881233.

The spelling of 285205134 in words is "two hundred eighty-five million, two hundred five thousand, one hundred thirty-four".