284320880 has 20 divisors (see below), whose sum is σ = 661046232. Its totient is φ = 113728320.

The previous prime is 284320867. The next prime is 284320919. The reversal of 284320880 is 88023482.

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

It is a self number, because there is not a number n which added to its sum of digits gives 284320880.

It is a congruent number.

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, 1776926 + ... + 1777085.

Almost surely, 2^284320880 is an apocalyptic number.

284320880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284320880 is an abundant number, since it is smaller than the sum of its proper divisors (376725352).

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

284320880 is a wasteful number, since it uses less digits than its factorization.

284320880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554024 (or 3554018 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 284320880 is about 16861.8172211657. The cubic root of 284320880 is about 657.5613093229.

The spelling of 284320880 in words is "two hundred eighty-four million, three hundred twenty thousand, eight hundred eighty".