27988538964 has 48 divisors (see below), whose sum is σ = 66345656832. Its totient is φ = 9182188512.

The previous prime is 27988538951. The next prime is 27988538969. The reversal of 27988538964 is 46983588972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27988538969) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 132007 + ... + 270929.

It is an arithmetic number, because the mean of its divisors is an integer number (1382201184).

Almost surely, 2^27988538964 is an apocalyptic number.

It is an amenable number.

27988538964 is an abundant number, since it is smaller than the sum of its proper divisors (38357117868).

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

27988538964 is a wasteful number, since it uses less digits than its factorization.

27988538964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139196 (or 139194 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 69.

The spelling of 27988538964 in words is "twenty-seven billion, nine hundred eighty-eight million, five hundred thirty-eight thousand, nine hundred sixty-four".