285285884 has 12 divisors (see below), whose sum is σ = 537654264. Its totient is φ = 131670384.

The previous prime is 285285877. The next prime is 285285943. The reversal of 285285884 is 488582582.

It is a super-2 number, since 2×285285884² = 162776071219322912, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2743082 + ... + 2743185.

It is an arithmetic number, because the mean of its divisors is an integer number (44804522).

Almost surely, 2^285285884 is an apocalyptic number.

It is an amenable number.

285285884 is a deficient number, since it is larger than the sum of its proper divisors (252368380).

285285884 is a wasteful number, since it uses less digits than its factorization.

285285884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486284 (or 5486282 counting only the distinct ones).

The product of its digits is 1638400, while the sum is 50.

The square root of 285285884 is about 16890.4080471728. The cubic root of 285285884 is about 658.3044048746.

The spelling of 285285884 in words is "two hundred eighty-five million, two hundred eighty-five thousand, eight hundred eighty-four".