128844880 has 20 divisors (see below), whose sum is σ = 299564532. Its totient is φ = 51537920.

The previous prime is 128844869. The next prime is 128844889. The reversal of 128844880 is 88448821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27962944 + 100881936 = 5288^2 + 10044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128844889) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 805201 + ... + 805360.

Almost surely, 2^128844880 is an apocalyptic number.

128844880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128844880 is an abundant number, since it is smaller than the sum of its proper divisors (170719652).

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

128844880 is a wasteful number, since it uses less digits than its factorization.

128844880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610574 (or 1610568 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 43.

The square root of 128844880 is about 11350.9858602678. The cubic root of 128844880 is about 505.0748247133.

The spelling of 128844880 in words is "one hundred twenty-eight million, eight hundred forty-four thousand, eight hundred eighty".