128966312 has 32 divisors (see below), whose sum is σ = 249523200. Its totient is φ = 62443584.

The previous prime is 128966303. The next prime is 128966323. The reversal of 128966312 is 213669821.

It is a happy number.

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, 69833 + ... + 71655.

It is an arithmetic number, because the mean of its divisors is an integer number (7797600).

Almost surely, 2^128966312 is an apocalyptic number.

It is an amenable number.

128966312 is a deficient number, since it is larger than the sum of its proper divisors (120556888).

128966312 is a wasteful number, since it uses less digits than its factorization.

128966312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105 (or 2101 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 128966312 is about 11356.3335632589. Note that the first 3 decimals coincide. The cubic root of 128966312 is about 505.2334469478.

The spelling of 128966312 in words is "one hundred twenty-eight million, nine hundred sixty-six thousand, three hundred twelve".