128865200 has 60 divisors (see below), whose sum is σ = 312448008. Its totient is φ = 51072000.

The previous prime is 128865199. The next prime is 128865223. The reversal of 128865200 is 2568821.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43775 + ... + 46625.

Almost surely, 2^128865200 is an apocalyptic number.

128865200 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 128865200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156224004).

128865200 is an abundant number, since it is smaller than the sum of its proper divisors (183582808).

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

128865200 is a wasteful number, since it uses less digits than its factorization.

128865200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2971 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 128865200 is about 11351.8809014189. The cubic root of 128865200 is about 505.1013749364.

The spelling of 128865200 in words is "one hundred twenty-eight million, eight hundred sixty-five thousand, two hundred".