128844564 has 72 divisors (see below), whose sum is σ = 330115968. Its totient is φ = 38976000.

The previous prime is 128844563. The next prime is 128844577. The reversal of 128844564 is 465448821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128844563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171189 + ... + 171939.

It is an arithmetic number, because the mean of its divisors is an integer number (4584944).

Almost surely, 2^128844564 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 128844564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165057984).

128844564 is an abundant number, since it is smaller than the sum of its proper divisors (201271404).

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

128844564 is a wasteful number, since it uses less digits than its factorization.

128844564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 802 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 128844564 is about 11350.9719407635. The cubic root of 128844564 is about 505.0744118039.

The spelling of 128844564 in words is "one hundred twenty-eight million, eight hundred forty-four thousand, five hundred sixty-four".