284928880 has 20 divisors (see below), whose sum is σ = 662459832. Its totient is φ = 113971520.

The previous prime is 284928841. The next prime is 284928881. The reversal of 284928880 is 88829482.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284928881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780726 + ... + 1780885.

Almost surely, 2^284928880 is an apocalyptic number.

284928880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284928880 is an abundant number, since it is smaller than the sum of its proper divisors (377530952).

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

284928880 is a wasteful number, since it uses less digits than its factorization.

284928880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561624 (or 3561618 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 49.

The square root of 284928880 is about 16879.8364920991. The cubic root of 284928880 is about 658.0296916601.

The spelling of 284928880 in words is "two hundred eighty-four million, nine hundred twenty-eight thousand, eight hundred eighty".