129024940 has 96 divisors (see below), whose sum is σ = 316141056. Its totient is φ = 43760640.

The previous prime is 129024937. The next prime is 129024941. The reversal of 129024940 is 49420921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129024941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217284 + ... + 217876.

It is an arithmetic number, because the mean of its divisors is an integer number (3293136).

Almost surely, 2^129024940 is an apocalyptic number.

129024940 is a gapful number since it is divisible by the number (10) 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 129024940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158070528).

129024940 is an abundant number, since it is smaller than the sum of its proper divisors (187116116).

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

129024940 is a wasteful number, since it uses less digits than its factorization.

129024940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 129024940 is about 11358.9145608196. The cubic root of 129024940 is about 505.3099949462.

The spelling of 129024940 in words is "one hundred twenty-nine million, twenty-four thousand, nine hundred forty".