128838912 has 36 divisors (see below), whose sum is σ = 342901440. Its totient is φ = 42946048.

The previous prime is 128838911. The next prime is 128838973. The reversal of 128838912 is 219838821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128838911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83112 + ... + 84647.

It is an arithmetic number, because the mean of its divisors is an integer number (9525040).

Almost surely, 2^128838912 is an apocalyptic number.

128838912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128838912 is an abundant number, since it is smaller than the sum of its proper divisors (214062528).

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

128838912 is an equidigital number, since it uses as much as digits as its factorization.

128838912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167778 (or 167764 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 128838912 is about 11350.7229725688. The cubic root of 128838912 is about 505.0670263615.

Subtracting 128838912 from its reverse (219838821), we obtain a palindrome (90999909).

The spelling of 128838912 in words is "one hundred twenty-eight million, eight hundred thirty-eight thousand, nine hundred twelve".