128934 has 48 divisors (see below), whose sum is σ = 327600. Its totient is φ = 36288.

The previous prime is 128923. The next prime is 128939. The reversal of 128934 is 439821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128898 and 128907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4432 + ... + 4460.

It is an arithmetic number, because the mean of its divisors is an integer number (6825).

2¹²⁸⁹³⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163800).

128934 is an abundant number, since it is smaller than the sum of its proper divisors (198666).

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

128934 is a wasteful number, since it uses less digits than its factorization.

128934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 66 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 128934 is about 359.0738085687. The cubic root of 128934 is about 50.5191248675.

The spelling of 128934 in words is "one hundred twenty-eight thousand, nine hundred thirty-four".