128945218 has 16 divisors (see below), whose sum is σ = 198703296. Its totient is φ = 62722800.

The previous prime is 128945207. The next prime is 128945251. The reversal of 128945218 is 812549821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19768 + ... + 25468.

It is an arithmetic number, because the mean of its divisors is an integer number (12418956).

Almost surely, 2^128945218 is an apocalyptic number.

128945218 is a deficient number, since it is larger than the sum of its proper divisors (69758078).

128945218 is a wasteful number, since it uses less digits than its factorization.

128945218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009.

The product of its digits is 46080, while the sum is 40.

The square root of 128945218 is about 11355.4047924325. The cubic root of 128945218 is about 505.2058997657.

The spelling of 128945218 in words is "one hundred twenty-eight million, nine hundred forty-five thousand, two hundred eighteen".