128726880 has 192 divisors, whose sum is σ = 430811136. Its totient is φ = 32256000.

The previous prime is 128726879. The next prime is 128726891. The reversal of 128726880 is 88627821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609975 + ... + 610185.

It is an arithmetic number, because the mean of its divisors is an integer number (2243808).

Almost surely, 2^128726880 is an apocalyptic number.

128726880 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 128726880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215405568).

128726880 is an abundant number, since it is smaller than the sum of its proper divisors (302084256).

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

128726880 is a wasteful number, since it uses less digits than its factorization.

128726880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 128726880 is about 11345.7868832444. The cubic root of 128726880 is about 504.9205900690.

The spelling of 128726880 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, eight hundred eighty".