128994 has 8 divisors (see below), whose sum is σ = 258000. Its totient is φ = 42996.

The previous prime is 128993. The next prime is 129001. The reversal of 128994 is 499821.

It is a sphenic number, since it is the product of 3 distinct primes.

128994 is an admirable number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 10744 + ... + 10755.

It is an arithmetic number, because the mean of its divisors is an integer number (32250).

2¹²⁸⁹⁹⁴ is an apocalyptic number.

128994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128994 is a wasteful number, since it uses less digits than its factorization.

128994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21504.

The product of its digits is 5184, while the sum is 33.

The square root of 128994 is about 359.1573471335. The cubic root of 128994 is about 50.5269600841.

The spelling of 128994 in words is "one hundred twenty-eight thousand, nine hundred ninety-four".