28044686889 has 64 divisors (see below), whose sum is σ = 43658721280. Its totient is φ = 17770337280.

The previous prime is 28044686863. The next prime is 28044686911. The reversal of 28044686889 is 98868644082.

It is not a de Polignac number, because 28044686889 - 2²⁷ = 27910469161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28044616889) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16924149 + ... + 16925805.

It is an arithmetic number, because the mean of its divisors is an integer number (682167520).

Almost surely, 2^28044686889 is an apocalyptic number.

It is an amenable number.

28044686889 is a deficient number, since it is larger than the sum of its proper divisors (15614034391).

28044686889 is a wasteful number, since it uses less digits than its factorization.

28044686889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047 (or 2041 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 63.

The spelling of 28044686889 in words is "twenty-eight billion, forty-four million, six hundred eighty-six thousand, eight hundred eighty-nine".