128700800 has 96 divisors (see below), whose sum is σ = 326824320. Its totient is φ = 50042880.

The previous prime is 128700799. The next prime is 128700841. The reversal of 128700800 is 8007821.

It is a self number, because there is not a number n which added to its sum of digits gives 128700800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117857 + ... + 118943.

It is an arithmetic number, because the mean of its divisors is an integer number (3404420).

Almost surely, 2^128700800 is an apocalyptic number.

128700800 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 128700800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163412160).

128700800 is an abundant number, since it is smaller than the sum of its proper divisors (198123520).

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

128700800 is a wasteful number, since it uses less digits than its factorization.

128700800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 128700800 is about 11344.6374997177. The cubic root of 128700800 is about 504.8864888815.

The spelling of 128700800 in words is "one hundred twenty-eight million, seven hundred thousand, eight hundred".