129040164 has 72 divisors (see below), whose sum is σ = 365496768. Its totient is φ = 38041920.

The previous prime is 129040159. The next prime is 129040187. The reversal of 129040164 is 461040921.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10249 + ... + 19055.

It is an arithmetic number, because the mean of its divisors is an integer number (5076344).

Almost surely, 2^129040164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129040164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182748384).

129040164 is an abundant number, since it is smaller than the sum of its proper divisors (236456604).

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

129040164 is a wasteful number, since it uses less digits than its factorization.

129040164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865 (or 8860 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 129040164 is about 11359.5846755064. The cubic root of 129040164 is about 505.3298684601.

The spelling of 129040164 in words is "one hundred twenty-nine million, forty thousand, one hundred sixty-four".