27688830912 has 112 divisors (see below), whose sum is σ = 81444998400. Its totient is φ = 9224513280.

The previous prime is 27688830881. The next prime is 27688830919. The reversal of 27688830912 is 21903888672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27688830919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4384237 + ... + 4390547.

Almost surely, 2^27688830912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27688830912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40722499200).

27688830912 is an abundant number, since it is smaller than the sum of its proper divisors (53756167488).

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

27688830912 is a wasteful number, since it uses less digits than its factorization.

27688830912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8871 (or 8855 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 27688830912 in words is "twenty-seven billion, six hundred eighty-eight million, eight hundred thirty thousand, nine hundred twelve".