27988798880 has 96 divisors (see below), whose sum is σ = 78007587840. Its totient is φ = 9286594560.

The previous prime is 27988798829. The next prime is 27988798933. The reversal of 27988798880 is 8889788972.

It is a junction number, because it is equal to n+sod(n) for n = 27988798798 and 27988798807.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368345 + ... + 437784.

It is an arithmetic number, because the mean of its divisors is an integer number (812579040).

Almost surely, 2^27988798880 is an apocalyptic number.

27988798880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27988798880 is an abundant number, since it is smaller than the sum of its proper divisors (50018788960).

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

27988798880 is a wasteful number, since it uses less digits than its factorization.

27988798880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806182 (or 806174 counting only the distinct ones).

The product of its (nonzero) digits is 260112384, while the sum is 74.

The spelling of 27988798880 in words is "twenty-seven billion, nine hundred eighty-eight million, seven hundred ninety-eight thousand, eight hundred eighty".