27807838686 has 24 divisors (see below), whose sum is σ = 60313976424. Its totient is φ = 9259485840.

The previous prime is 27807838679. The next prime is 27807838687. The reversal of 27807838686 is 68683870872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27807838687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 798625 + ... + 832716.

It is an arithmetic number, because the mean of its divisors is an integer number (2513082351).

Almost surely, 2^27807838686 is an apocalyptic number.

27807838686 is an abundant number, since it is smaller than the sum of its proper divisors (32506137738).

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

27807838686 is a wasteful number, since it uses less digits than its factorization.

27807838686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632296 (or 1632293 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 27807838686 in words is "twenty-seven billion, eight hundred seven million, eight hundred thirty-eight thousand, six hundred eighty-six".