128441913 has 16 divisors (see below), whose sum is σ = 180971520. Its totient is φ = 80864784.

The previous prime is 128441861. The next prime is 128441923. The reversal of 128441913 is 319144821.

It is a happy number.

It is not a de Polignac number, because 128441913 - 2⁶ = 128441849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128441923) 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, 6331 + ... + 17232.

It is an arithmetic number, because the mean of its divisors is an integer number (11310720).

Almost surely, 2^128441913 is an apocalyptic number.

It is an amenable number.

128441913 is a deficient number, since it is larger than the sum of its proper divisors (52529607).

128441913 is a wasteful number, since it uses less digits than its factorization.

128441913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23668.

The product of its digits is 6912, while the sum is 33.

The square root of 128441913 is about 11333.2216514105. The cubic root of 128441913 is about 504.5477282615.

The spelling of 128441913 in words is "one hundred twenty-eight million, four hundred forty-one thousand, nine hundred thirteen".