129639180 has 96 divisors (see below), whose sum is σ = 400619520. Its totient is φ = 31060480.

The previous prime is 129639151. The next prime is 129639217. The reversal of 129639180 is 81936921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57637 + ... + 59843.

It is an arithmetic number, because the mean of its divisors is an integer number (4173120).

Almost surely, 2^129639180 is an apocalyptic number.

129639180 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 129639180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200309760).

129639180 is an abundant number, since it is smaller than the sum of its proper divisors (270980340).

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

129639180 is a wasteful number, since it uses less digits than its factorization.

129639180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 129639180 is about 11385.9202526629. The cubic root of 129639180 is about 506.1105904809.

The spelling of 129639180 in words is "one hundred twenty-nine million, six hundred thirty-nine thousand, one hundred eighty".