128375279 has 8 divisors (see below), whose sum is σ = 136026288. Its totient is φ = 120735360.

The previous prime is 128375263. The next prime is 128375281. The reversal of 128375279 is 972573821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128375279 - 2⁴ = 128375263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128375239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40409 + ... + 43469.

It is an arithmetic number, because the mean of its divisors is an integer number (17003286).

Almost surely, 2^128375279 is an apocalyptic number.

128375279 is a deficient number, since it is larger than the sum of its proper divisors (7651009).

128375279 is a wasteful number, since it uses less digits than its factorization.

128375279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545.

The product of its digits is 211680, while the sum is 44.

The square root of 128375279 is about 11330.2815057703. The cubic root of 128375279 is about 504.4604622279.

The spelling of 128375279 in words is "one hundred twenty-eight million, three hundred seventy-five thousand, two hundred seventy-nine".