129037680 has 120 divisors (see below), whose sum is σ = 435588192. Its totient is φ = 34232832.

The previous prime is 129037639. The next prime is 129037681. The reversal of 129037680 is 86730921.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129037681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199117 + ... + 199763.

Almost surely, 2^129037680 is an apocalyptic number.

129037680 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 129037680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217794096).

129037680 is an abundant number, since it is smaller than the sum of its proper divisors (306550512).

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

129037680 is a wasteful number, since it uses less digits than its factorization.

129037680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 129037680 is about 11359.4753399970. The cubic root of 129037680 is about 505.3266259362.

The spelling of 129037680 in words is "one hundred twenty-nine million, thirty-seven thousand, six hundred eighty".