284921856 has 156 divisors (see below), whose sum is σ = 843345360. Its totient is φ = 92651520.

The previous prime is 284921843. The next prime is 284921869. The reversal of 284921856 is 658129482.

284921856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (284921843) and next prime (284921869).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2174911 + ... + 2175041.

It is an arithmetic number, because the mean of its divisors is an integer number (5406060).

Almost surely, 2^284921856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 284921856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421672680).

284921856 is an abundant number, since it is smaller than the sum of its proper divisors (558423504).

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

284921856 is a wasteful number, since it uses less digits than its factorization.

284921856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 195 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 284921856 is about 16879.6284319294. The cubic root of 284921856 is about 658.0242844177.

The spelling of 284921856 in words is "two hundred eighty-four million, nine hundred twenty-one thousand, eight hundred fifty-six".