128666912 has 24 divisors (see below), whose sum is σ = 276342192. Its totient is φ = 58484800.

The previous prime is 128666893. The next prime is 128666921. The reversal of 128666912 is 219666821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128666912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182414 + ... + 183117.

It is an arithmetic number, because the mean of its divisors is an integer number (11514258).

Almost surely, 2^128666912 is an apocalyptic number.

It is an amenable number.

128666912 is an abundant number, since it is smaller than the sum of its proper divisors (147675280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128666912 is a wasteful number, since it uses less digits than its factorization.

128666912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365552 (or 365544 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 128666912 is about 11343.1438322892. The cubic root of 128666912 is about 504.8421713760.

Subtracting 128666912 from its reverse (219666821), we obtain a palindrome (90999909).

The spelling of 128666912 in words is "one hundred twenty-eight million, six hundred sixty-six thousand, nine hundred twelve".