128172892884 has 24 divisors (see below), whose sum is σ = 303533817888. Its totient is φ = 42086621280.

The previous prime is 128172892873. The next prime is 128172892907. The reversal of 128172892884 is 488298271821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79708707 + ... + 79710314.

It is an arithmetic number, because the mean of its divisors is an integer number (12647242412).

Almost surely, 2^128172892884 is an apocalyptic number.

It is an amenable number.

128172892884 is an abundant number, since it is smaller than the sum of its proper divisors (175360925004).

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

128172892884 is a wasteful number, since it uses less digits than its factorization.

128172892884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159419095 (or 159419093 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 60.

The spelling of 128172892884 in words is "one hundred twenty-eight billion, one hundred seventy-two million, eight hundred ninety-two thousand, eight hundred eighty-four".