128115218 has 16 divisors (see below), whose sum is σ = 239592384. Its totient is φ = 49914960.

The previous prime is 128115217. The next prime is 128115223. The reversal of 128115218 is 812511821.

It is not an unprimeable number, because it can be changed into a prime (128115217) 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, 415805 + ... + 416112.

It is an arithmetic number, because the mean of its divisors is an integer number (14974524).

Almost surely, 2^128115218 is an apocalyptic number.

128115218 is a deficient number, since it is larger than the sum of its proper divisors (111477166).

128115218 is a wasteful number, since it uses less digits than its factorization.

128115218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831937.

The product of its digits is 1280, while the sum is 29.

The square root of 128115218 is about 11318.7993179489. The cubic root of 128115218 is about 504.1195887588.

The spelling of 128115218 in words is "one hundred twenty-eight million, one hundred fifteen thousand, two hundred eighteen".