128555528 has 32 divisors (see below), whose sum is σ = 250853760. Its totient is φ = 61713600.

The previous prime is 128555507. The next prime is 128555549. The reversal of 128555528 is 825555821.

It is an interprime number because it is at equal distance from previous prime (128555507) and next prime (128555549).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 16703 + ... + 23153.

It is an arithmetic number, because the mean of its divisors is an integer number (7839180).

Almost surely, 2^128555528 is an apocalyptic number.

It is an amenable number.

128555528 is a deficient number, since it is larger than the sum of its proper divisors (122298232).

128555528 is a wasteful number, since it uses less digits than its factorization.

128555528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6553 counting only the distinct ones).

The product of its digits is 160000, while the sum is 41.

The square root of 128555528 is about 11338.2330193024. The cubic root of 128555528 is about 504.6964525495.

The spelling of 128555528 in words is "one hundred twenty-eight million, five hundred fifty-five thousand, five hundred twenty-eight".