28128736308 has 24 divisors (see below), whose sum is σ = 65740110912. Its totient is φ = 9361046464.

The previous prime is 28128736283. The next prime is 28128736319. The reversal of 28128736308 is 80363782182.

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, 1892160 + ... + 1906967.

It is an arithmetic number, because the mean of its divisors is an integer number (2739171288).

Almost surely, 2^28128736308 is an apocalyptic number.

It is an amenable number.

28128736308 is an abundant number, since it is smaller than the sum of its proper divisors (37611374604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28128736308 is a wasteful number, since it uses less digits than its factorization.

28128736308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799751 (or 3799749 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 28128736308 in words is "twenty-eight billion, one hundred twenty-eight million, seven hundred thirty-six thousand, three hundred eight".