128885445000 has 1280 divisors, whose sum is σ = 523992268800. Its totient is φ = 29082240000.

The previous prime is 128885444959. The next prime is 128885445011. The reversal of 128885445000 is 544588821.

128885445000 is a `hidden beast` number, since 1 + 28 + 8 + 85 + 44 + 500 + 0 = 666.

It is a super-2 number, since 2×128885445000² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1251314949 + ... + 1251315051.

It is an arithmetic number, because the mean of its divisors is an integer number (409368960).

Almost surely, 2^128885445000 is an apocalyptic number.

128885445000 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 128885445000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261996134400).

128885445000 is an abundant number, since it is smaller than the sum of its proper divisors (395106823800).

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

128885445000 is a wasteful number, since it uses less digits than its factorization.

128885445000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 45.

The spelling of 128885445000 in words is "one hundred twenty-eight billion, eight hundred eighty-five million, four hundred forty-five thousand".