285005688 has 64 divisors (see below), whose sum is σ = 779051520. Its totient is φ = 86169600.

The previous prime is 285005683. The next prime is 285005689. The reversal of 285005688 is 886500582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285005683) 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 15 ways as a sum of consecutive naturals, for example, 151393 + ... + 153263.

It is an arithmetic number, because the mean of its divisors is an integer number (12172680).

Almost surely, 2^285005688 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 285005688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389525760).

285005688 is an abundant number, since it is smaller than the sum of its proper divisors (494045832).

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

285005688 is a wasteful number, since it uses less digits than its factorization.

285005688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 285005688 is about 16882.1114793144. Note that the first 3 decimals coincide. The cubic root of 285005688 is about 658.0888144883.

The spelling of 285005688 in words is "two hundred eighty-five million, five thousand, six hundred eighty-eight".