27988322054440 has 32 divisors (see below), whose sum is σ = 68698608680160. Its totient is φ = 10177571656000.

The previous prime is 27988322054423. The next prime is 27988322054443. The reversal of 27988322054440 is 4445022388972.

It is not an unprimeable number, because it can be changed into a prime (27988322054443) 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 7 ways as a sum of consecutive naturals, for example, 31804910986 + ... + 31804911865.

It is an arithmetic number, because the mean of its divisors is an integer number (2146831521255).

Almost surely, 2^{27988322054440} is an apocalyptic number.

27988322054440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27988322054440 is an abundant number, since it is smaller than the sum of its proper divisors (40710286625720).

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

27988322054440 is a wasteful number, since it uses less digits than its factorization.

27988322054440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63609822873 (or 63609822869 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 58.

The spelling of 27988322054440 in words is "twenty-seven trillion, nine hundred eighty-eight billion, three hundred twenty-two million, fifty-four thousand, four hundred forty".