285599985 has 32 divisors (see below), whose sum is σ = 505543680. Its totient is φ = 136516800.

The previous prime is 285599969. The next prime is 285599989. The reversal of 285599985 is 589995582.

It is not a de Polignac number, because 285599985 - 2⁴ = 285599969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285599989) 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 31 ways as a sum of consecutive naturals, for example, 475 + ... + 23904.

It is an arithmetic number, because the mean of its divisors is an integer number (15798240).

Almost surely, 2^285599985 is an apocalyptic number.

It is an amenable number.

285599985 is a deficient number, since it is larger than the sum of its proper divisors (219943695).

285599985 is a wasteful number, since it uses less digits than its factorization.

285599985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24469.

The product of its digits is 11664000, while the sum is 60.

The square root of 285599985 is about 16899.7036956273. The cubic root of 285599985 is about 658.5459149334.

The spelling of 285599985 in words is "two hundred eighty-five million, five hundred ninety-nine thousand, nine hundred eighty-five".