129444 has 48 divisors (see below), whose sum is σ = 365568. Its totient is φ = 34848.

The previous prime is 129443. The next prime is 129449. The reversal of 129444 is 444921.

It is not an unprimeable number, because it can be changed into a prime (129443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1899 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (7616).

2¹²⁹⁴⁴⁴ is an apocalyptic number.

129444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182784).

129444 is an abundant number, since it is smaller than the sum of its proper divisors (236124).

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

129444 is a wasteful number, since it uses less digits than its factorization.

129444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 102 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 129444 is about 359.7832680934. The cubic root of 129444 is about 50.5856469052.

The spelling of 129444 in words is "one hundred twenty-nine thousand, four hundred forty-four".