128395659 has 16 divisors (see below), whose sum is σ = 195813632. Its totient is φ = 73307808.

The previous prime is 128395639. The next prime is 128395691. The reversal of 128395659 is 956593821.

It is a happy number.

It is not a de Polignac number, because 128395659 - 2⁸ = 128395403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128395609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39012 + ... + 42174.

It is an arithmetic number, because the mean of its divisors is an integer number (12238352).

Almost surely, 2^128395659 is an apocalyptic number.

128395659 is a deficient number, since it is larger than the sum of its proper divisors (67417973).

128395659 is a wasteful number, since it uses less digits than its factorization.

128395659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106.

The product of its digits is 583200, while the sum is 48.

The square root of 128395659 is about 11331.1808299047. The cubic root of 128395659 is about 504.4871557375.

The spelling of 128395659 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, six hundred fifty-nine".