128924880 has 240 divisors, whose sum is σ = 490236480. Its totient is φ = 27869184.

The previous prime is 128924849. The next prime is 128924881. The reversal of 128924880 is 88429821.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128924881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223152 + ... + 223728.

It is an arithmetic number, because the mean of its divisors is an integer number (2042652).

Almost surely, 2^128924880 is an apocalyptic number.

128924880 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 128924880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245118240).

128924880 is an abundant number, since it is smaller than the sum of its proper divisors (361311600).

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

128924880 is a wasteful number, since it uses less digits than its factorization.

128924880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 613 counting only the distinct ones).

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

The square root of 128924880 is about 11354.5092364223. The cubic root of 128924880 is about 505.1793370181.

The spelling of 128924880 in words is "one hundred twenty-eight million, nine hundred twenty-four thousand, eight hundred eighty".