128550418 has 16 divisors (see below), whose sum is σ = 195019200. Its totient is φ = 63548496.

The previous prime is 128550343. The next prime is 128550419. The reversal of 128550418 is 814055821.

It is not an unprimeable number, because it can be changed into a prime (128550419) 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, 67921 + ... + 69787.

It is an arithmetic number, because the mean of its divisors is an integer number (12188700).

Almost surely, 2^128550418 is an apocalyptic number.

128550418 is a deficient number, since it is larger than the sum of its proper divisors (66468782).

128550418 is a wasteful number, since it uses less digits than its factorization.

128550418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 128550418 is about 11338.0076733084. The cubic root of 128550418 is about 504.6897653405.

The spelling of 128550418 in words is "one hundred twenty-eight million, five hundred fifty thousand, four hundred eighteen".