27728760805 has 8 divisors (see below), whose sum is σ = 34347884544. Its totient is φ = 21467427600.

The previous prime is 27728760803. The next prime is 27728760863. The reversal of 27728760805 is 50806782772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27728760805 - 2¹ = 27728760803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728760803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89447461 + ... + 89447770.

It is an arithmetic number, because the mean of its divisors is an integer number (4293485568).

Almost surely, 2^27728760805 is an apocalyptic number.

It is an amenable number.

27728760805 is a deficient number, since it is larger than the sum of its proper divisors (6619123739).

27728760805 is a wasteful number, since it uses less digits than its factorization.

27728760805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178895267.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 27728760805 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred sixty thousand, eight hundred five".