128801280 has 160 divisors (see below), whose sum is σ = 425829888. Its totient is φ = 33177600.

The previous prime is 128801263. The next prime is 128801293. The reversal of 128801280 is 82108821.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 237810 + ... + 238350.

Almost surely, 2^128801280 is an apocalyptic number.

128801280 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 128801280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212914944).

128801280 is an abundant number, since it is smaller than the sum of its proper divisors (297028608).

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

128801280 is an equidigital number, since it uses as much as digits as its factorization.

128801280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 128801280 is about 11349.0651597389. The cubic root of 128801280 is about 505.0178472927.

The spelling of 128801280 in words is "one hundred twenty-eight million, eight hundred one thousand, two hundred eighty".