128847912 has 64 divisors (see below), whose sum is σ = 338990400. Its totient is φ = 40757760.

The previous prime is 128847907. The next prime is 128847931. The reversal of 128847912 is 219748821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34639 + ... + 38177.

It is an arithmetic number, because the mean of its divisors is an integer number (5296725).

Almost surely, 2^128847912 is an apocalyptic number.

128847912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128847912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169495200).

128847912 is an abundant number, since it is smaller than the sum of its proper divisors (210142488).

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

128847912 is a wasteful number, since it uses less digits than its factorization.

128847912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626 (or 3622 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 128847912 is about 11351.1194161633. The cubic root of 128847912 is about 505.0787865182.

Subtracting 128847912 from its reverse (219748821), we obtain a palindrome (90900909).

The spelling of 128847912 in words is "one hundred twenty-eight million, eight hundred forty-seven thousand, nine hundred twelve".