128850 has 24 divisors (see below), whose sum is σ = 319920. Its totient is φ = 34320.

The previous prime is 128837. The next prime is 128857. The reversal of 128850 is 58821.

It is a self number, because there is not a number n which added to its sum of digits gives 128850.

It is not an unprimeable number, because it can be changed into a prime (128857) by changing a digit.

128850 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (13330).

2¹²⁸⁸⁵⁰ is an apocalyptic number.

128850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128850 is an abundant number, since it is smaller than the sum of its proper divisors (191070).

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

128850 is a wasteful number, since it uses less digits than its factorization.

128850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 128850 is about 358.9568219160. The cubic root of 128850 is about 50.5081514796.

The spelling of 128850 in words is "one hundred twenty-eight thousand, eight hundred fifty".