128576279 has 16 divisors (see below), whose sum is σ = 144947712. Its totient is φ = 113164128.

The previous prime is 128576257. The next prime is 128576293. The reversal of 128576279 is 972675821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 128576279 - 2⁸ = 128576023 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128576299) by changing a digit.

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, 145172 + ... + 146054.

It is an arithmetic number, because the mean of its divisors is an integer number (9059232).

Almost surely, 2^128576279 is an apocalyptic number.

128576279 is a deficient number, since it is larger than the sum of its proper divisors (16371433).

128576279 is a wasteful number, since it uses less digits than its factorization.

128576279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its digits is 423360, while the sum is 47.

The square root of 128576279 is about 11339.1480720555. The cubic root of 128576279 is about 504.7236065552.

The spelling of 128576279 in words is "one hundred twenty-eight million, five hundred seventy-six thousand, two hundred seventy-nine".