128405480 has 96 divisors (see below), whose sum is σ = 338826240. Its totient is φ = 43794240.

The previous prime is 128405443. The next prime is 128405489. The reversal of 128405480 is 84504821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128405489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 672185 + ... + 672375.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^128405480 is an apocalyptic number.

128405480 is a gapful number since it is divisible by the number (10) 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 128405480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169413120).

128405480 is an abundant number, since it is smaller than the sum of its proper divisors (210420760).

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

128405480 is an frugal number, since it uses more digits than its factorization.

128405480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 128405480 is about 11331.6141833368. The cubic root of 128405480 is about 504.5000181714.

The spelling of 128405480 in words is "one hundred twenty-eight million, four hundred five thousand, four hundred eighty".