27728588866 has 64 divisors (see below), whose sum is σ = 48817105920. Its totient is φ = 11678247360.

The previous prime is 27728588857. The next prime is 27728588869. The reversal of 27728588866 is 66888582772.

It is not an unprimeable number, because it can be changed into a prime (27728588869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7685635 + ... + 7689241.

It is an arithmetic number, because the mean of its divisors is an integer number (762767280).

Almost surely, 2^27728588866 is an apocalyptic number.

27728588866 is a deficient number, since it is larger than the sum of its proper divisors (21088517054).

27728588866 is a wasteful number, since it uses less digits than its factorization.

27728588866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039.

The product of its digits is 144506880, while the sum is 67.

The spelling of 27728588866 in words is "twenty-seven billion, seven hundred twenty-eight million, five hundred eighty-eight thousand, eight hundred sixty-six".