128872443 has 32 divisors (see below), whose sum is σ = 205066240. Its totient is φ = 70450560.

The previous prime is 128872439. The next prime is 128872453. The reversal of 128872443 is 344278821.

It is not a de Polignac number, because 128872443 - 2² = 128872439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128872453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46038 + ... + 48756.

It is an arithmetic number, because the mean of its divisors is an integer number (6408320).

Almost surely, 2^128872443 is an apocalyptic number.

128872443 is a deficient number, since it is larger than the sum of its proper divisors (76193797).

128872443 is a wasteful number, since it uses less digits than its factorization.

128872443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827.

The product of its digits is 86016, while the sum is 39.

The square root of 128872443 is about 11352.1999189584. The cubic root of 128872443 is about 505.1108380051.

The spelling of 128872443 in words is "one hundred twenty-eight million, eight hundred seventy-two thousand, four hundred forty-three".