128840488884 has 18 divisors (see below), whose sum is σ = 325680124770. Its totient is φ = 42946829616.

The previous prime is 128840488873. The next prime is 128840488951. The reversal of 128840488884 is 488884048821.

It can be written as a sum of positive squares in only one way, i.e., 118252078884 + 10588410000 = 343878^2 + 102900^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1789451199 + ... + 1789451270.

It is an arithmetic number, because the mean of its divisors is an integer number (18093340265).

Almost surely, 2^128840488884 is an apocalyptic number.

It is an amenable number.

128840488884 is an abundant number, since it is smaller than the sum of its proper divisors (196839635886).

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

128840488884 is a wasteful number, since it uses less digits than its factorization.

128840488884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578902479 (or 3578902474 counting only the distinct ones).

The product of its (nonzero) digits is 33554432, while the sum is 63.

The spelling of 128840488884 in words is "one hundred twenty-eight billion, eight hundred forty million, four hundred eighty-eight thousand, eight hundred eighty-four".