27728760686 has 16 divisors (see below), whose sum is σ = 45377781120. Its totient is φ = 12603025080.

The previous prime is 27728760659. The next prime is 27728760691. The reversal of 27728760686 is 68606782772.

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, 306905 + ... + 386843.

It is an arithmetic number, because the mean of its divisors is an integer number (2836111320).

Almost surely, 2^27728760686 is an apocalyptic number.

27728760686 is a deficient number, since it is larger than the sum of its proper divisors (17649020434).

27728760686 is a wasteful number, since it uses less digits than its factorization.

27728760686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95719.

The product of its (nonzero) digits is 18966528, while the sum is 59.

The spelling of 27728760686 in words is "twenty-seven billion, seven hundred twenty-eight million, seven hundred sixty thousand, six hundred eighty-six".