128928480 has 96 divisors (see below), whose sum is σ = 409891104. Its totient is φ = 34062336.

The previous prime is 128928479. The next prime is 128928517. The reversal of 128928480 is 84829821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×128928480² = 33245105910220800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53052 + ... + 55428.

It is an arithmetic number, because the mean of its divisors is an integer number (4269699).

Almost surely, 2^128928480 is an apocalyptic number.

128928480 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 128928480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204945552).

128928480 is an abundant number, since it is smaller than the sum of its proper divisors (280962624).

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

128928480 is a wasteful number, since it uses less digits than its factorization.

128928480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508 (or 2500 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 128928480 is about 11354.6677626428. The cubic root of 128928480 is about 505.1840390552.

The spelling of 128928480 in words is "one hundred twenty-eight million, nine hundred twenty-eight thousand, four hundred eighty".