128838963 has 16 divisors (see below), whose sum is σ = 187600896. Its totient is φ = 78001440.

The previous prime is 128838911. The next prime is 128838973. The reversal of 128838963 is 369838821.

It is not a de Polignac number, because 128838963 - 2²⁰ = 127790387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128838973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46606 + ... + 49292.

It is an arithmetic number, because the mean of its divisors is an integer number (11725056).

Almost surely, 2^128838963 is an apocalyptic number.

128838963 is a deficient number, since it is larger than the sum of its proper divisors (58761933).

128838963 is a wasteful number, since it uses less digits than its factorization.

128838963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154.

The product of its digits is 497664, while the sum is 48.

The square root of 128838963 is about 11350.7252191215. The cubic root of 128838963 is about 505.0670930039.

The spelling of 128838963 in words is "one hundred twenty-eight million, eight hundred thirty-eight thousand, nine hundred sixty-three".