128839116 has 24 divisors (see below), whose sum is σ = 343571200. Its totient is φ = 36811152.

The previous prime is 128839111. The next prime is 128839121. The reversal of 128839116 is 611938821.

It is an interprime number because it is at equal distance from previous prime (128839111) and next prime (128839121).

It is a super-2 number, since 2×128839116² = 33199035623322912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128839111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766816 + ... + 766983.

Almost surely, 2^128839116 is an apocalyptic number.

It is an amenable number.

128839116 is an abundant number, since it is smaller than the sum of its proper divisors (214732084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128839116 is a wasteful number, since it uses less digits than its factorization.

128839116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533813 (or 1533811 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 128839116 is about 11350.7319587769. The cubic root of 128839116 is about 505.0672929311.

It can be divided in two parts, 1288 and 39116, that added together give a palindrome (40404).

The spelling of 128839116 in words is "one hundred twenty-eight million, eight hundred thirty-nine thousand, one hundred sixteen".