128872056 has 32 divisors (see below), whose sum is σ = 333291600. Its totient is φ = 41475840.

The previous prime is 128872049. The next prime is 128872057. The reversal of 128872056 is 650278821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128872057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 91885 + ... + 93276.

Almost surely, 2^128872056 is an apocalyptic number.

It is an amenable number.

128872056 is an abundant number, since it is smaller than the sum of its proper divisors (204419544).

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

128872056 is a wasteful number, since it uses less digits than its factorization.

128872056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185199 (or 185195 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 128872056 is about 11352.1828737913. The cubic root of 128872056 is about 505.1103323938.

The spelling of 128872056 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, fifty-six".