128025397920 has 384 divisors, whose sum is σ = 488832454656. Its totient is φ = 27494793216.

The previous prime is 128025397909. The next prime is 128025397999. The reversal of 128025397920 is 29793520821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 128025397920.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41524699 + ... + 41527781.

It is an arithmetic number, because the mean of its divisors is an integer number (1273001184).

Almost surely, 2^128025397920 is an apocalyptic number.

128025397920 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 128025397920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244416227328).

128025397920 is an abundant number, since it is smaller than the sum of its proper divisors (360807056736).

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

128025397920 is a wasteful number, since it uses less digits than its factorization.

128025397920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852 (or 3844 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 128025397920 in words is "one hundred twenty-eight billion, twenty-five million, three hundred ninety-seven thousand, nine hundred twenty".