285805328 has 20 divisors (see below), whose sum is σ = 554138640. Its totient is φ = 142801824.

The previous prime is 285805259. The next prime is 285805339. The reversal of 285805328 is 823508582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20543 + ... + 31521.

It is an arithmetic number, because the mean of its divisors is an integer number (27706932).

Almost surely, 2^285805328 is an apocalyptic number.

It is an amenable number.

285805328 is a deficient number, since it is larger than the sum of its proper divisors (268333312).

285805328 is a wasteful number, since it uses less digits than its factorization.

285805328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12614 (or 12608 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 285805328 is about 16905.7779471990. Note that the first 3 decimals coincide. The cubic root of 285805328 is about 658.7037060221.

The spelling of 285805328 in words is "two hundred eighty-five million, eight hundred five thousand, three hundred twenty-eight".