28748866672 has 20 divisors (see below), whose sum is σ = 55715505160. Its totient is φ = 14370671808.

The previous prime is 28748866669. The next prime is 28748866703. The reversal of 28748866672 is 27666884782.

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, 171522 + ... + 294817.

It is an arithmetic number, because the mean of its divisors is an integer number (2785775258).

Almost surely, 2^28748866672 is an apocalyptic number.

It is an amenable number.

28748866672 is a deficient number, since it is larger than the sum of its proper divisors (26966638488).

28748866672 is a wasteful number, since it uses less digits than its factorization.

28748866672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470200 (or 470194 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 64.

The spelling of 28748866672 in words is "twenty-eight billion, seven hundred forty-eight million, eight hundred sixty-six thousand, six hundred seventy-two".