129580380 has 72 divisors (see below), whose sum is σ = 413758800. Its totient is φ = 32735232.

The previous prime is 129580379. The next prime is 129580397. The reversal of 129580380 is 83085921.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15525 + ... + 22364.

It is an arithmetic number, because the mean of its divisors is an integer number (5746650).

Almost surely, 2^129580380 is an apocalyptic number.

129580380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129580380 is an abundant number, since it is smaller than the sum of its proper divisors (284178420).

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

129580380 is a wasteful number, since it uses less digits than its factorization.

129580380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37923 (or 37918 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 129580380 is about 11383.3378233276. The cubic root of 129580380 is about 506.0340606254.

The spelling of 129580380 in words is "one hundred twenty-nine million, five hundred eighty thousand, three hundred eighty".