128441881 has 16 divisors (see below), whose sum is σ = 138284800. Its totient is φ = 118937808.

The previous prime is 128441861. The next prime is 128441923. The reversal of 128441881 is 188144821.

It is a cyclic number.

It is not a de Polignac number, because 128441881 - 2⁵ = 128441849 is a prime.

It is a super-2 number, since 2×128441881² = 32994633589636322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128441881.

It is not an unprimeable number, because it can be changed into a prime (128441861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207190 + ... + 207808.

It is an arithmetic number, because the mean of its divisors is an integer number (8642800).

Almost surely, 2^128441881 is an apocalyptic number.

It is an amenable number.

128441881 is a deficient number, since it is larger than the sum of its proper divisors (9842919).

128441881 is a wasteful number, since it uses less digits than its factorization.

128441881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its digits is 16384, while the sum is 37.

The square root of 128441881 is about 11333.2202396318. The cubic root of 128441881 is about 504.5476863605.

The spelling of 128441881 in words is "one hundred twenty-eight million, four hundred forty-one thousand, eight hundred eighty-one".