128816600 has 72 divisors (see below), whose sum is σ = 329262780. Its totient is φ = 46833600.

The previous prime is 128816593. The next prime is 128816627. The reversal of 128816600 is 6618821.

It is a congruent number.

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, 21539 + ... + 26861.

Almost surely, 2^128816600 is an apocalyptic number.

128816600 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 128816600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164631390).

128816600 is an abundant number, since it is smaller than the sum of its proper divisors (200446180).

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

128816600 is a wasteful number, since it uses less digits than its factorization.

128816600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361 (or 5341 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 128816600 is about 11349.7400851297. The cubic root of 128816600 is about 505.0378692642.

The spelling of 128816600 in words is "one hundred twenty-eight million, eight hundred sixteen thousand, six hundred".