128555408 has 20 divisors (see below), whose sum is σ = 249292080. Its totient is φ = 64221984.

The previous prime is 128555389. The next prime is 128555417. The reversal of 128555408 is 804555821.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 20591 + ... + 26097.

It is an arithmetic number, because the mean of its divisors is an integer number (12464604).

Almost surely, 2^128555408 is an apocalyptic number.

It is an amenable number.

128555408 is a deficient number, since it is larger than the sum of its proper divisors (120736672).

128555408 is a wasteful number, since it uses less digits than its factorization.

128555408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6968 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 38.

The square root of 128555408 is about 11338.2277274713. The cubic root of 128555408 is about 504.6962955133.

The spelling of 128555408 in words is "one hundred twenty-eight million, five hundred fifty-five thousand, four hundred eight".