285089828 has 24 divisors (see below), whose sum is σ = 516996480. Its totient is φ = 137460960.

The previous prime is 285089803. The next prime is 285089839. The reversal of 285089828 is 828980582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3098 + ... + 24078.

It is an arithmetic number, because the mean of its divisors is an integer number (21541520).

Almost surely, 2^285089828 is an apocalyptic number.

It is an amenable number.

285089828 is a deficient number, since it is larger than the sum of its proper divisors (231906652).

285089828 is a wasteful number, since it uses less digits than its factorization.

285089828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107 (or 21105 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 50.

The square root of 285089828 is about 16884.6032822806. The cubic root of 285089828 is about 658.1535689208.

The spelling of 285089828 in words is "two hundred eighty-five million, eighty-nine thousand, eight hundred twenty-eight".