128321200 has 90 divisors (see below), whose sum is σ = 358679796. Its totient is φ = 43989120.

The previous prime is 128321197. The next prime is 128321243. The reversal of 128321200 is 2123821.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16327 + ... + 22873.

Almost surely, 2^128321200 is an apocalyptic number.

128321200 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 128321200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179339898).

128321200 is an abundant number, since it is smaller than the sum of its proper divisors (230358596).

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

128321200 is a wasteful number, since it uses less digits than its factorization.

128321200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6579 (or 6561 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 128321200 is about 11327.8947735226. The cubic root of 128321200 is about 504.3896164255.

The spelling of 128321200 in words is "one hundred twenty-eight million, three hundred twenty-one thousand, two hundred".