27984086984 has 24 divisors (see below), whose sum is σ = 61036721190. Its totient is φ = 11993179968.

The previous prime is 27984086983. The next prime is 27984086989. The reversal of 27984086984 is 48968048972.

It can be written as a sum of positive squares in only one way, i.e., 24485364484 + 3498722500 = 156478^2 + 59150^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27984086984.

It is not an unprimeable number, because it can be changed into a prime (27984086983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35693597 + ... + 35694380.

Almost surely, 2^27984086984 is an apocalyptic number.

It is an amenable number.

27984086984 is an abundant number, since it is smaller than the sum of its proper divisors (33052634206).

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

27984086984 is a wasteful number, since it uses less digits than its factorization.

27984086984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71387997 (or 71387986 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 27984086984 in words is "twenty-seven billion, nine hundred eighty-four million, eighty-six thousand, nine hundred eighty-four".