129844 has 24 divisors (see below), whose sum is σ = 268128. Its totient is φ = 54240.

The previous prime is 129841. The next prime is 129853. The reversal of 129844 is 448921.

129844 = 46² + 47² + ... + 78².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129841) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 459 + ... + 685.

It is an arithmetic number, because the mean of its divisors is an integer number (11172).

2¹²⁹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

129844 is an abundant number, since it is smaller than the sum of its proper divisors (138284).

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

129844 is a wasteful number, since it uses less digits than its factorization.

129844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 253 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 129844 is about 360.3387295310. The cubic root of 129844 is about 50.6376988922.

The spelling of 129844 in words is "one hundred twenty-nine thousand, eight hundred forty-four".