129120180 has 96 divisors (see below), whose sum is σ = 427472640. Its totient is φ = 28492800.

The previous prime is 129120169. The next prime is 129120203. The reversal of 129120180 is 81021921.

It is a self number, because there is not a number n which added to its sum of digits gives 129120180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6880 + ... + 17480.

It is an arithmetic number, because the mean of its divisors is an integer number (4452840).

Almost surely, 2^129120180 is an apocalyptic number.

129120180 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 129120180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213736320).

129120180 is an abundant number, since it is smaller than the sum of its proper divisors (298352460).

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

129120180 is a wasteful number, since it uses less digits than its factorization.

129120180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10649 (or 10647 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 129120180 is about 11363.1060894458. The cubic root of 129120180 is about 505.4342962051.

The spelling of 129120180 in words is "one hundred twenty-nine million, one hundred twenty thousand, one hundred eighty".