128171792 has 40 divisors (see below), whose sum is σ = 286440000. Its totient is φ = 54421632.

The previous prime is 128171783. The next prime is 128171803. The reversal of 128171792 is 297171821.

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, 6959 + ... + 17457.

It is an arithmetic number, because the mean of its divisors is an integer number (7161000).

Almost surely, 2^128171792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128171792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143220000).

128171792 is an abundant number, since it is smaller than the sum of its proper divisors (158268208).

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

128171792 is a wasteful number, since it uses less digits than its factorization.

128171792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10623 (or 10617 counting only the distinct ones).

The product of its digits is 14112, while the sum is 38.

The square root of 128171792 is about 11321.2981587802. The cubic root of 128171792 is about 504.1937820385.

The spelling of 128171792 in words is "one hundred twenty-eight million, one hundred seventy-one thousand, seven hundred ninety-two".