285428856 has 16 divisors (see below), whose sum is σ = 713572200. Its totient is φ = 95142944.

The previous prime is 285428789. The next prime is 285428879. The reversal of 285428856 is 658824582.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5946411 + ... + 5946458.

Almost surely, 2^285428856 is an apocalyptic number.

It is an amenable number.

285428856 is an abundant number, since it is smaller than the sum of its proper divisors (428143344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285428856 is a wasteful number, since it uses less digits than its factorization.

285428856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11892878 (or 11892874 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The square root of 285428856 is about 16894.6398600266. The cubic root of 285428856 is about 658.4143570130.

The spelling of 285428856 in words is "two hundred eighty-five million, four hundred twenty-eight thousand, eight hundred fifty-six".