128676656 has 30 divisors (see below), whose sum is σ = 251710452. Its totient is φ = 63724000.

The previous prime is 128676641. The next prime is 128676659. The reversal of 128676656 is 656676821.

Its product of digits (725760) is a multiple of the sum of its prime divisors (432).

It is a self number, because there is not a number n which added to its sum of digits gives 128676656.

It is not an unprimeable number, because it can be changed into a prime (128676659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 512531 + ... + 512781.

Almost surely, 2^128676656 is an apocalyptic number.

128676656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128676656 is a deficient number, since it is larger than the sum of its proper divisors (123033796).

128676656 is an equidigital number, since it uses as much as digits as its factorization.

128676656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 432 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 128676656 is about 11343.5733347125. The cubic root of 128676656 is about 504.8549150251.

The spelling of 128676656 in words is "one hundred twenty-eight million, six hundred seventy-six thousand, six hundred fifty-six".