128920932480 has 128 divisors (see below), whose sum is σ = 412884331200. Its totient is φ = 34215874560.

The previous prime is 128920932479. The next prime is 128920932487. The reversal of 128920932480 is 84239029821.

128920932480 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (128920932487) 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 15 ways as a sum of consecutive naturals, for example, 246006 + ... + 564234.

Almost surely, 2^128920932480 is an apocalyptic number.

128920932480 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 128920932480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206442165600).

128920932480 is an abundant number, since it is smaller than the sum of its proper divisors (283963398720).

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

128920932480 is a wasteful number, since it uses less digits than its factorization.

128920932480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318462 (or 318450 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 128920932480 in words is "one hundred twenty-eight billion, nine hundred twenty million, nine hundred thirty-two thousand, four hundred eighty".