128878323 has 16 divisors (see below), whose sum is σ = 198333696. Its totient is φ = 72914400.

The previous prime is 128878313. The next prime is 128878339. The reversal of 128878323 is 323878821.

It is not a de Polignac number, because 128878323 - 2¹² = 128874227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128878313) 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, 28261 + ... + 32502.

It is an arithmetic number, because the mean of its divisors is an integer number (12395856).

Almost surely, 2^128878323 is an apocalyptic number.

128878323 is a deficient number, since it is larger than the sum of its proper divisors (69455373).

128878323 is a wasteful number, since it uses less digits than its factorization.

128878323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60874.

The product of its digits is 129024, while the sum is 42.

The square root of 128878323 is about 11352.4588966444. The cubic root of 128878323 is about 505.1185200368.

The spelling of 128878323 in words is "one hundred twenty-eight million, eight hundred seventy-eight thousand, three hundred twenty-three".