128032912 has 40 divisors (see below), whose sum is σ = 293284800. Its totient is φ = 52977792.

The previous prime is 128032907. The next prime is 128032943. The reversal of 128032912 is 219230821.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent 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, 16462 + ... + 22957.

It is an arithmetic number, because the mean of its divisors is an integer number (7332120).

Almost surely, 2^128032912 is an apocalyptic number.

It is an amenable number.

128032912 is an abundant number, since it is smaller than the sum of its proper divisors (165251888).

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

128032912 is a wasteful number, since it uses less digits than its factorization.

128032912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39463 (or 39457 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 128032912 is about 11315.1629241474. The cubic root of 128032912 is about 504.0116105497.

The spelling of 128032912 in words is "one hundred twenty-eight million, thirty-two thousand, nine hundred twelve".