128271882 has 8 divisors (see below), whose sum is σ = 256543776. Its totient is φ = 42757292.

The previous prime is 128271863. The next prime is 128271887. The reversal of 128271882 is 288172821.

It is a sphenic number, since it is the product of 3 distinct primes.

128271882 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 128271882.

It is not an unprimeable number, because it can be changed into a prime (128271887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10689318 + ... + 10689329.

It is an arithmetic number, because the mean of its divisors is an integer number (32067972).

Almost surely, 2^128271882 is an apocalyptic number.

128271882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128271882 is a wasteful number, since it uses less digits than its factorization.

128271882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21378652.

The product of its digits is 28672, while the sum is 39.

The square root of 128271882 is about 11325.7177256013. The cubic root of 128271882 is about 504.3249903814.

The spelling of 128271882 in words is "one hundred twenty-eight million, two hundred seventy-one thousand, eight hundred eighty-two".