129489024 has 128 divisors (see below), whose sum is σ = 399513600. Its totient is φ = 36393984.

The previous prime is 129489013. The next prime is 129489043. The reversal of 129489024 is 420984921.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179737 + ... + 180455.

It is an arithmetic number, because the mean of its divisors is an integer number (3121200).

Almost surely, 2^129489024 is an apocalyptic number.

129489024 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 129489024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199756800).

129489024 is an abundant number, since it is smaller than the sum of its proper divisors (270024576).

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

129489024 is an equidigital number, since it uses as much as digits as its factorization.

129489024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 129489024 is about 11379.3244087687. The cubic root of 129489024 is about 505.9151122785.

The spelling of 129489024 in words is "one hundred twenty-nine million, four hundred eighty-nine thousand, twenty-four".