128928935 has 16 divisors (see below), whose sum is σ = 164301696. Its totient is φ = 96787968.

The previous prime is 128928881. The next prime is 128928941. The reversal of 128928935 is 539829821.

It is a cyclic number.

It is not a de Polignac number, because 128928935 - 2²⁴ = 112151719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128928935.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29129 + ... + 33261.

It is an arithmetic number, because the mean of its divisors is an integer number (10268856).

Almost surely, 2^128928935 is an apocalyptic number.

128928935 is a deficient number, since it is larger than the sum of its proper divisors (35372761).

128928935 is a wasteful number, since it uses less digits than its factorization.

128928935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522.

The product of its digits is 311040, while the sum is 47.

The square root of 128928935 is about 11354.6877984381. The cubic root of 128928935 is about 505.1846333342.

The spelling of 128928935 in words is "one hundred twenty-eight million, nine hundred twenty-eight thousand, nine hundred thirty-five".