27982427886 has 128 divisors (see below), whose sum is σ = 72981995520. Its totient is φ = 7782220800.

The previous prime is 27982427849. The next prime is 27982427899. The reversal of 27982427886 is 68872428972.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2230371 + ... + 2242881.

It is an arithmetic number, because the mean of its divisors is an integer number (570171840).

Almost surely, 2^27982427886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27982427886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36490997760).

27982427886 is an abundant number, since it is smaller than the sum of its proper divisors (44999567634).

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

27982427886 is a wasteful number, since it uses less digits than its factorization.

27982427886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12687 (or 12681 counting only the distinct ones).

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

The spelling of 27982427886 in words is "twenty-seven billion, nine hundred eighty-two million, four hundred twenty-seven thousand, eight hundred eighty-six".