128450880 has 112 divisors (see below), whose sum is σ = 453176640. Its totient is φ = 34251264.

The previous prime is 128450879. The next prime is 128450897. The reversal of 128450880 is 88054821.

128450880 is a `hidden beast` number, since 128 + 450 + 8 + 80 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1207 + ... + 16073.

It is an arithmetic number, because the mean of its divisors is an integer number (4046220).

Almost surely, 2^128450880 is an apocalyptic number.

128450880 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 128450880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226588320).

128450880 is an abundant number, since it is smaller than the sum of its proper divisors (324725760).

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

128450880 is a wasteful number, since it uses less digits than its factorization.

128450880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14893 (or 14877 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 128450880 is about 11333.6172513457. The cubic root of 128450880 is about 504.5594694294.

The spelling of 128450880 in words is "one hundred twenty-eight million, four hundred fifty thousand, eight hundred eighty".