128960256 has 36 divisors (see below), whose sum is σ = 343224392. Its totient is φ = 42986496.

The previous prime is 128960243. The next prime is 128960257. The reversal of 128960256 is 652069821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128960257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83191 + ... + 84726.

Almost surely, 2^128960256 is an apocalyptic number.

128960256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128960256 is an abundant number, since it is smaller than the sum of its proper divisors (214264136).

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

128960256 is an equidigital number, since it uses as much as digits as its factorization.

128960256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167936 (or 167922 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 128960256 is about 11356.0669247764. The cubic root of 128960256 is about 505.2255385734.

The spelling of 128960256 in words is "one hundred twenty-eight million, nine hundred sixty thousand, two hundred fifty-six".