28111100128 has 24 divisors (see below), whose sum is σ = 55347993792. Its totient is φ = 14054466816.

The previous prime is 28111100119. The next prime is 28111100167. The reversal of 28111100128 is 82100111182.

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, 534801 + ... + 585007.

It is an arithmetic number, because the mean of its divisors is an integer number (2306166408).

Almost surely, 2^28111100128 is an apocalyptic number.

It is an amenable number.

28111100128 is a deficient number, since it is larger than the sum of its proper divisors (27236893664).

28111100128 is a wasteful number, since it uses less digits than its factorization.

28111100128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67714 (or 67706 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 25.

The spelling of 28111100128 in words is "twenty-eight billion, one hundred eleven million, one hundred thousand, one hundred twenty-eight".