28384228432 has 120 divisors (see below), whose sum is σ = 69922310400. Its totient is φ = 11079613440.

The previous prime is 28384228361. The next prime is 28384228469. The reversal of 28384228432 is 23482248382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378819 + ... + 447517.

It is an arithmetic number, because the mean of its divisors is an integer number (582685920).

Almost surely, 2^28384228432 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 28384228432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34961155200).

28384228432 is an abundant number, since it is smaller than the sum of its proper divisors (41538081968).

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

28384228432 is a wasteful number, since it uses less digits than its factorization.

28384228432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68769 (or 68756 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 46.

The spelling of 28384228432 in words is "twenty-eight billion, three hundred eighty-four million, two hundred twenty-eight thousand, four hundred thirty-two".