285285983 has 4 divisors (see below), whose sum is σ = 285400368. Its totient is φ = 285171600.

The previous prime is 285285977. The next prime is 285285991. The reversal of 285285983 is 389582582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 285285983 - 2⁴ = 285285967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285285943) 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 3 ways as a sum of consecutive naturals, for example, 53366 + ... + 58467.

It is an arithmetic number, because the mean of its divisors is an integer number (71350092).

Almost surely, 2^285285983 is an apocalyptic number.

285285983 is a deficient number, since it is larger than the sum of its proper divisors (114385).

285285983 is a wasteful number, since it uses less digits than its factorization.

285285983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114384.

The product of its digits is 1382400, while the sum is 50.

The square root of 285285983 is about 16890.4109778300. The cubic root of 285285983 is about 658.3044810229.

The spelling of 285285983 in words is "two hundred eighty-five million, two hundred eighty-five thousand, nine hundred eighty-three".