129371980 has 48 divisors (see below), whose sum is σ = 282683520. Its totient is φ = 49690368.

The previous prime is 129371971. The next prime is 129371981. The reversal of 129371980 is 89173921.

It is not an unprimeable number, because it can be changed into a prime (129371981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57354 + ... + 59566.

It is an arithmetic number, because the mean of its divisors is an integer number (5889240).

Almost surely, 2^129371980 is an apocalyptic number.

129371980 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 129371980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141341760).

129371980 is an abundant number, since it is smaller than the sum of its proper divisors (153311540).

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

129371980 is a wasteful number, since it uses less digits than its factorization.

129371980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2336 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 129371980 is about 11374.1804100339. The cubic root of 129371980 is about 505.7626355752.

The spelling of 129371980 in words is "one hundred twenty-nine million, three hundred seventy-one thousand, nine hundred eighty".