128836756 has 12 divisors (see below), whose sum is σ = 227998260. Its totient is φ = 63694400.

The previous prime is 128836723. The next prime is 128836781. The reversal of 128836756 is 657638821.

It can be written as a sum of positive squares in 2 ways, for example, as 18922500 + 109914256 = 4350^2 + 10484^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180595 + ... + 181306.

It is an arithmetic number, because the mean of its divisors is an integer number (18999855).

Almost surely, 2^128836756 is an apocalyptic number.

It is an amenable number.

128836756 is a deficient number, since it is larger than the sum of its proper divisors (99161504).

128836756 is a wasteful number, since it uses less digits than its factorization.

128836756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361994 (or 361992 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 128836756 is about 11350.6280002474. The cubic root of 128836756 is about 505.0642090693.

The spelling of 128836756 in words is "one hundred twenty-eight million, eight hundred thirty-six thousand, seven hundred fifty-six".