128877879 has 12 divisors (see below), whose sum is σ = 186072936. Its totient is φ = 79309152.

The previous prime is 128877869. The next prime is 128877887. The reversal of 128877879 is 978778821.

It is not a de Polignac number, because 128877879 - 2⁴ = 128877863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128877869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126592 + ... + 127605.

It is an arithmetic number, because the mean of its divisors is an integer number (15506078).

Almost surely, 2^128877879 is an apocalyptic number.

128877879 is a deficient number, since it is larger than the sum of its proper divisors (57195057).

128877879 is a wasteful number, since it uses less digits than its factorization.

128877879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254226 (or 254213 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 57.

The square root of 128877879 is about 11352.4393413927. The cubic root of 128877879 is about 505.1179399731.

The spelling of 128877879 in words is "one hundred twenty-eight million, eight hundred seventy-seven thousand, eight hundred seventy-nine".