285770985 has 16 divisors (see below), whose sum is σ = 457462080. Its totient is φ = 152335040.

The previous prime is 285770977. The next prime is 285770987. The reversal of 285770985 is 589077582.

It is not a de Polignac number, because 285770985 - 2³ = 285770977 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (285770987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39586 + ... + 46244.

It is an arithmetic number, because the mean of its divisors is an integer number (28591380).

Almost surely, 2^285770985 is an apocalyptic number.

It is an amenable number.

285770985 is a deficient number, since it is larger than the sum of its proper divisors (171691095).

285770985 is a wasteful number, since it uses less digits than its factorization.

285770985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528.

The product of its (nonzero) digits is 1411200, while the sum is 51.

The square root of 285770985 is about 16904.7621988598. The cubic root of 285770985 is about 658.6773212008.

The spelling of 285770985 in words is "two hundred eighty-five million, seven hundred seventy thousand, nine hundred eighty-five".