128444911 has 8 divisors (see below), whose sum is σ = 155429280. Its totient is φ = 103619328.

The previous prime is 128444891. The next prime is 128444929. The reversal of 128444911 is 119444821.

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

It is a cyclic number.

It is not a de Polignac number, because 128444911 - 2⁷ = 128444783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128444941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539566 + ... + 539803.

It is an arithmetic number, because the mean of its divisors is an integer number (19428660).

Almost surely, 2^128444911 is an apocalyptic number.

128444911 is a deficient number, since it is larger than the sum of its proper divisors (26984369).

128444911 is a wasteful number, since it uses less digits than its factorization.

128444911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079393.

The product of its digits is 9216, while the sum is 34.

The square root of 128444911 is about 11333.3539166480. The cubic root of 128444911 is about 504.5516538293.

The spelling of 128444911 in words is "one hundred twenty-eight million, four hundred forty-four thousand, nine hundred eleven".