285000005 has 16 divisors (see below), whose sum is σ = 350542080. Its totient is φ = 222376128.

The previous prime is 284999999. The next prime is 285000013. The reversal of 285000005 is 500000582.

It is a cyclic number.

It is not a de Polignac number, because 285000005 - 2⁶ = 284999941 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 28439 + ... + 37131.

It is an arithmetic number, because the mean of its divisors is an integer number (21908880).

Almost surely, 2^285000005 is an apocalyptic number.

It is an amenable number.

285000005 is a deficient number, since it is larger than the sum of its proper divisors (65542075).

285000005 is an equidigital number, since it uses as much as digits as its factorization.

285000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 285000005 is about 16881.9431642214. The cubic root of 285000005 is about 658.0844403726.

Adding to 285000005 its reverse (500000582), we get a palindrome (785000587).

The spelling of 285000005 in words is "two hundred eighty-five million, five", and thus it is an aban number.