128440227 has 16 divisors (see below), whose sum is σ = 174936960. Its totient is φ = 83798400.

The previous prime is 128440187. The next prime is 128440229. The reversal of 128440227 is 722044821.

It is not a de Polignac number, because 128440227 - 2¹⁶ = 128374691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128440194 and 128440203.

It is not an unprimeable number, because it can be changed into a prime (128440229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41152 + ... + 44162.

It is an arithmetic number, because the mean of its divisors is an integer number (10933560).

Almost surely, 2^128440227 is an apocalyptic number.

128440227 is a deficient number, since it is larger than the sum of its proper divisors (46496733).

128440227 is a wasteful number, since it uses less digits than its factorization.

128440227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 128440227 is about 11333.1472680805. The cubic root of 128440227 is about 504.5455205938.

The spelling of 128440227 in words is "one hundred twenty-eight million, four hundred forty thousand, two hundred twenty-seven".