128308480 has 72 divisors (see below), whose sum is σ = 312732000. Its totient is φ = 50423808.

The previous prime is 128308457. The next prime is 128308483. The reversal of 128308480 is 84803821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128308483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74671 + ... + 76369.

It is an arithmetic number, because the mean of its divisors is an integer number (4343500).

Almost surely, 2^128308480 is an apocalyptic number.

128308480 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 128308480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156366000).

128308480 is an abundant number, since it is smaller than the sum of its proper divisors (184423520).

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

128308480 is an equidigital number, since it uses as much as digits as its factorization.

128308480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 128308480 is about 11327.3333137151. Note that the first 4 decimals coincide. The cubic root of 128308480 is about 504.3729497902.

The spelling of 128308480 in words is "one hundred twenty-eight million, three hundred eight thousand, four hundred eighty".