128856000 has 448 divisors, whose sum is σ = 532546560. Its totient is φ = 26726400.

The previous prime is 128855981. The next prime is 128856029. The reversal of 128856000 is 658821.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 2183971 + ... + 2184029.

It is an arithmetic number, because the mean of its divisors is an integer number (1188720).

Almost surely, 2^128856000 is an apocalyptic number.

128856000 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 128856000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266273280).

128856000 is an abundant number, since it is smaller than the sum of its proper divisors (403690560).

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

128856000 is a wasteful number, since it uses less digits than its factorization.

128856000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 128856000 is about 11351.4756749949. The cubic root of 128856000 is about 505.0893545119.

The spelling of 128856000 in words is "one hundred twenty-eight million, eight hundred fifty-six thousand".