285140205 has 24 divisors (see below), whose sum is σ = 564849792. Its totient is φ = 130349664.

The previous prime is 285140179. The next prime is 285140213. The reversal of 285140205 is 502041582.

It is a happy number.

It is not a de Polignac number, because 285140205 - 2⁸ = 285139949 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 452289 + ... + 452918.

It is an arithmetic number, because the mean of its divisors is an integer number (23535408).

Almost surely, 2^285140205 is an apocalyptic number.

It is an amenable number.

285140205 is a deficient number, since it is larger than the sum of its proper divisors (279709587).

285140205 is a wasteful number, since it uses less digits than its factorization.

285140205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905225 (or 905222 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 285140205 is about 16886.0950192755. The cubic root of 285140205 is about 658.1923331352.

Adding to 285140205 its reverse (502041582), we get a palindrome (787181787).

The spelling of 285140205 in words is "two hundred eighty-five million, one hundred forty thousand, two hundred five".