128250056 has 32 divisors (see below), whose sum is σ = 263062080. Its totient is φ = 58132800.

The previous prime is 128250043. The next prime is 128250071. The reversal of 128250056 is 650052821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33101 + ... + 36771.

It is an arithmetic number, because the mean of its divisors is an integer number (8220690).

Almost surely, 2^128250056 is an apocalyptic number.

It is an amenable number.

128250056 is an abundant number, since it is smaller than the sum of its proper divisors (134812024).

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

128250056 is a wasteful number, since it uses less digits than its factorization.

128250056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4085 (or 4081 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 128250056 is about 11324.7541253663. The cubic root of 128250056 is about 504.2963844197.

The spelling of 128250056 in words is "one hundred twenty-eight million, two hundred fifty thousand, fifty-six".