27728745108 has 12 divisors (see below), whose sum is σ = 64700405280. Its totient is φ = 9242915032.

The previous prime is 27728745097. The next prime is 27728745193. The reversal of 27728745108 is 80154782772.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

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, 1155364368 + ... + 1155364391.

It is an arithmetic number, because the mean of its divisors is an integer number (5391700440).

Almost surely, 2^27728745108 is an apocalyptic number.

It is an amenable number.

27728745108 is an abundant number, since it is smaller than the sum of its proper divisors (36971660172).

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

27728745108 is a wasteful number, since it uses less digits than its factorization.

27728745108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310728766 (or 2310728764 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 27728745108 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred forty-five thousand, one hundred eight".