128935185 has 16 divisors (see below), whose sum is σ = 206509824. Its totient is φ = 68694272.

The previous prime is 128935139. The next prime is 128935211. The reversal of 128935185 is 581539821.

It is a cyclic number.

It is not a de Polignac number, because 128935185 - 2⁸ = 128934929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12649 + ... + 20441.

It is an arithmetic number, because the mean of its divisors is an integer number (12906864).

Almost surely, 2^128935185 is an apocalyptic number.

128935185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128935185 is a deficient number, since it is larger than the sum of its proper divisors (77574639).

128935185 is a wasteful number, since it uses less digits than its factorization.

128935185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904.

The product of its digits is 86400, while the sum is 42.

The square root of 128935185 is about 11354.9630118288. The cubic root of 128935185 is about 505.1927963659.

The spelling of 128935185 in words is "one hundred twenty-eight million, nine hundred thirty-five thousand, one hundred eighty-five".