28239289108 has 12 divisors (see below), whose sum is σ = 49420086912. Its totient is φ = 14119264280.

The previous prime is 28239289093. The next prime is 28239289151. The reversal of 28239289108 is 80198293282.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132591 + ... + 272137.

It is an arithmetic number, because the mean of its divisors is an integer number (4118340576).

Almost surely, 2^28239289108 is an apocalyptic number.

It is an amenable number.

28239289108 is a deficient number, since it is larger than the sum of its proper divisors (21180797804).

28239289108 is a wasteful number, since it uses less digits than its factorization.

28239289108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190142 (or 190140 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 28239289108 in words is "twenty-eight billion, two hundred thirty-nine million, two hundred eighty-nine thousand, one hundred eight".