28755454784 has 84 divisors (see below), whose sum is σ = 66776474016. Its totient is φ = 12249748224.

The previous prime is 28755454781. The next prime is 28755454807. The reversal of 28755454784 is 48745455782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755454781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 496259 + ... + 551165.

It is an arithmetic number, because the mean of its divisors is an integer number (794958024).

Almost surely, 2^28755454784 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 28755454784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33388237008).

28755454784 is an abundant number, since it is smaller than the sum of its proper divisors (38021019232).

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

28755454784 is a wasteful number, since it uses less digits than its factorization.

28755454784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55100 (or 55083 counting only the distinct ones).

The product of its digits is 50176000, while the sum is 59.

The spelling of 28755454784 in words is "twenty-eight billion, seven hundred fifty-five million, four hundred fifty-four thousand, seven hundred eighty-four".