285090866 has 8 divisors (see below), whose sum is σ = 427782684. Its totient is φ = 142496640.

The previous prime is 285090863. The next prime is 285090887. The reversal of 285090866 is 668090582.

It is a happy number.

285090866 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 281400625 + 3690241 = 16775^2 + 1921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (285090863) 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, 16595 + ... + 29078.

Almost surely, 2^285090866 is an apocalyptic number.

285090866 is a deficient number, since it is larger than the sum of its proper divisors (142691818).

285090866 is a wasteful number, since it uses less digits than its factorization.

285090866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48796.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 285090866 is about 16884.6340203156. The cubic root of 285090866 is about 658.1543676896.

The spelling of 285090866 in words is "two hundred eighty-five million, ninety thousand, eight hundred sixty-six".