128234438886 has 64 divisors (see below), whose sum is σ = 271569957120. Its totient is φ = 40255044480.

The previous prime is 128234438873. The next prime is 128234438911. The reversal of 128234438886 is 688834432821.

128234438886 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43364920 + ... + 43367876.

It is an arithmetic number, because the mean of its divisors is an integer number (4243280580).

Almost surely, 2^128234438886 is an apocalyptic number.

128234438886 is an abundant number, since it is smaller than the sum of its proper divisors (143335518234).

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

128234438886 is a wasteful number, since it uses less digits than its factorization.

128234438886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5109.

The product of its digits is 14155776, while the sum is 57.

The spelling of 128234438886 in words is "one hundred twenty-eight billion, two hundred thirty-four million, four hundred thirty-eight thousand, eight hundred eighty-six".