128924350720 has 144 divisors (see below), whose sum is σ = 340227397440. Its totient is φ = 46416896000.

The previous prime is 128924350631. The next prime is 128924350721. The reversal of 128924350720 is 27053429821.

It is not an unprimeable number, because it can be changed into a prime (128924350721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1376751 + ... + 1467409.

It is an arithmetic number, because the mean of its divisors is an integer number (2362690260).

Almost surely, 2^128924350720 is an apocalyptic number.

128924350720 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 128924350720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170113698720).

128924350720 is an abundant number, since it is smaller than the sum of its proper divisors (211303046720).

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

128924350720 is a wasteful number, since it uses less digits than its factorization.

128924350720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90792 (or 90778 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 128924350720 in words is "one hundred twenty-eight billion, nine hundred twenty-four million, three hundred fifty thousand, seven hundred twenty".