128860556 has 24 divisors (see below), whose sum is σ = 247813776. Its totient is φ = 58142720.

The previous prime is 128860553. The next prime is 128860577. The reversal of 128860556 is 655068821.

It is not an unprimeable number, because it can be changed into a prime (128860553) by changing a digit.

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, 4661 + ... + 16716.

It is an arithmetic number, because the mean of its divisors is an integer number (10325574).

Almost surely, 2^128860556 is an apocalyptic number.

It is an amenable number.

128860556 is a deficient number, since it is larger than the sum of its proper divisors (118953220).

128860556 is a wasteful number, since it uses less digits than its factorization.

128860556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21529 (or 21527 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 128860556 is about 11351.6763519755. The cubic root of 128860556 is about 505.0953073067.

The spelling of 128860556 in words is "one hundred twenty-eight million, eight hundred sixty thousand, five hundred fifty-six".