128113939800 has 432 divisors, whose sum is σ = 545997699000. Its totient is φ = 26620876800.

The previous prime is 128113939783. The next prime is 128113939801. The reversal of 128113939800 is 8939311821.

128113939800 is a `hidden beast` number, since 128 + 1 + 139 + 398 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128113939801) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 904176 + ... + 1036224.

Almost surely, 2^128113939800 is an apocalyptic number.

128113939800 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 128113939800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272998849500).

128113939800 is an abundant number, since it is smaller than the sum of its proper divisors (417883759200).

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

128113939800 is a wasteful number, since it uses less digits than its factorization.

128113939800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132096 (or 132077 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 128113939800 in words is "one hundred twenty-eight billion, one hundred thirteen million, nine hundred thirty-nine thousand, eight hundred".