28736794884 has 96 divisors (see below), whose sum is σ = 78893982720. Its totient is φ = 7969180032.

The previous prime is 28736794861. The next prime is 28736794949. The reversal of 28736794884 is 48849763782.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1291219 + ... + 1313285.

It is an arithmetic number, because the mean of its divisors is an integer number (821812320).

Almost surely, 2^28736794884 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 28736794884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39446991360).

28736794884 is an abundant number, since it is smaller than the sum of its proper divisors (50157187836).

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

28736794884 is a wasteful number, since it uses less digits than its factorization.

28736794884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22537 (or 22535 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 66.

The spelling of 28736794884 in words is "twenty-eight billion, seven hundred thirty-six million, seven hundred ninety-four thousand, eight hundred eighty-four".