27988360418 has 6 divisors (see below), whose sum is σ = 41982895521. Its totient is φ = 13994061912.

The previous prime is 27988360409. The next prime is 27988360423. The reversal of 27988360418 is 81406388972.

It can be written as a sum of positive squares in 2 ways, for example, as 18190726129 + 9797634289 = 134873^2 + 98983^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118297.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 177446 + ... + 295742.

Almost surely, 2^27988360418 is an apocalyptic number.

27988360418 is a deficient number, since it is larger than the sum of its proper divisors (13994535103).

27988360418 is an frugal number, since it uses more digits than its factorization.

27988360418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236596 (or 118299 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 27988360418 in words is "twenty-seven billion, nine hundred eighty-eight million, three hundred sixty thousand, four hundred eighteen".