128315312 has 20 divisors (see below), whose sum is σ = 252018840. Its totient is φ = 63278208.

The previous prime is 128315309. The next prime is 128315323. The reversal of 128315312 is 213513821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53762 + ... + 56097.

It is an arithmetic number, because the mean of its divisors is an integer number (12600942).

Almost surely, 2^128315312 is an apocalyptic number.

It is an amenable number.

128315312 is a deficient number, since it is larger than the sum of its proper divisors (123703528).

128315312 is a wasteful number, since it uses less digits than its factorization.

128315312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109940 (or 109934 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 128315312 is about 11327.6348811215. The cubic root of 128315312 is about 504.3819016922.

The spelling of 128315312 in words is "one hundred twenty-eight million, three hundred fifteen thousand, three hundred twelve".