128688796 has 12 divisors (see below), whose sum is σ = 225454320. Its totient is φ = 64273280.

The previous prime is 128688757. The next prime is 128688799. The reversal of 128688796 is 697886821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128688799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13600 + ... + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (18787860).

Almost surely, 2^128688796 is an apocalyptic number.

It is an amenable number.

128688796 is a deficient number, since it is larger than the sum of its proper divisors (96765524).

128688796 is a wasteful number, since it uses less digits than its factorization.

128688796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35564 (or 35562 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 128688796 is about 11344.1084268443. The cubic root of 128688796 is about 504.8707913726.

The spelling of 128688796 in words is "one hundred twenty-eight million, six hundred eighty-eight thousand, seven hundred ninety-six".