22389128784 has 80 divisors (see below), whose sum is σ = 70107387840. Its totient is φ = 6784583040.

The previous prime is 22389128777. The next prime is 22389128807. The reversal of 22389128784 is 48782198322.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 22389128784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2351007 + ... + 2360510.

It is an arithmetic number, because the mean of its divisors is an integer number (876342348).

Almost surely, 2^22389128784 is an apocalyptic number.

22389128784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22389128784 is an abundant number, since it is smaller than the sum of its proper divisors (47718259056).

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

22389128784 is a wasteful number, since it uses less digits than its factorization.

22389128784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4711545 (or 4711533 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 22389128784 in words is "twenty-two billion, three hundred eighty-nine million, one hundred twenty-eight thousand, seven hundred eighty-four".