28938215228 has 12 divisors (see below), whose sum is σ = 54537405720. Its totient is φ = 13356099312.

The previous prime is 28938215213. The next prime is 28938215281. The reversal of 28938215228 is 82251283982.

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, 278252018 + ... + 278252121.

It is an arithmetic number, because the mean of its divisors is an integer number (4544783810).

Almost surely, 2^28938215228 is an apocalyptic number.

It is an amenable number.

28938215228 is a deficient number, since it is larger than the sum of its proper divisors (25599190492).

28938215228 is a wasteful number, since it uses less digits than its factorization.

28938215228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556504156 (or 556504154 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 50.

The spelling of 28938215228 in words is "twenty-eight billion, nine hundred thirty-eight million, two hundred fifteen thousand, two hundred twenty-eight".