128996 has 24 divisors (see below), whose sum is σ = 274176. Its totient is φ = 51840.

The previous prime is 128993. The next prime is 129001. The reversal of 128996 is 699821.

It is not an unprimeable number, because it can be changed into a prime (128993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341 + ... + 611.

It is an arithmetic number, because the mean of its divisors is an integer number (11424).

2¹²⁸⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137088).

128996 is an abundant number, since it is smaller than the sum of its proper divisors (145180).

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

128996 is a wasteful number, since it uses less digits than its factorization.

128996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 297 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 128996 is about 359.1601314177. The cubic root of 128996 is about 50.5272212161.

The spelling of 128996 in words is "one hundred twenty-eight thousand, nine hundred ninety-six".