128801868 has 48 divisors (see below), whose sum is σ = 327327840. Its totient is φ = 39181824.

The previous prime is 128801867. The next prime is 128801873. The reversal of 128801868 is 868108821.

It is not an unprimeable number, because it can be changed into a prime (128801861) 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, 9246 + ... + 18522.

It is an arithmetic number, because the mean of its divisors is an integer number (6819330).

Almost surely, 2^128801868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128801868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163663920).

128801868 is an abundant number, since it is smaller than the sum of its proper divisors (198525972).

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

128801868 is a wasteful number, since it uses less digits than its factorization.

128801868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9386 (or 9384 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 128801868 is about 11349.0910649267. The cubic root of 128801868 is about 505.0186157893.

The spelling of 128801868 in words is "one hundred twenty-eight million, eight hundred one thousand, eight hundred sixty-eight".