28128065012 has 24 divisors (see below), whose sum is σ = 49580112960. Its totient is φ = 13962576320.

The previous prime is 28128064963. The next prime is 28128065023. The reversal of 28128065012 is 21056082182.

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 7 ways as a sum of consecutive naturals, for example, 409937 + ... + 473607.

It is an arithmetic number, because the mean of its divisors is an integer number (2065838040).

Almost surely, 2^28128065012 is an apocalyptic number.

It is an amenable number.

28128065012 is a deficient number, since it is larger than the sum of its proper divisors (21452047948).

28128065012 is a wasteful number, since it uses less digits than its factorization.

28128065012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64471 (or 64469 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The spelling of 28128065012 in words is "twenty-eight billion, one hundred twenty-eight million, sixty-five thousand, twelve".