129839320 has 48 divisors (see below), whose sum is σ = 316355760. Its totient is φ = 47938176.

The previous prime is 129839291. The next prime is 129839321. The reversal of 129839320 is 23938921.

It is a self number, because there is not a number n which added to its sum of digits gives 129839320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129839321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2844 + ... + 16363.

It is an arithmetic number, because the mean of its divisors is an integer number (6590745).

Almost surely, 2^129839320 is an apocalyptic number.

129839320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129839320 is an abundant number, since it is smaller than the sum of its proper divisors (186516440).

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

129839320 is a wasteful number, since it uses less digits than its factorization.

129839320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19244 (or 19227 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 129839320 is about 11394.7057882159. The cubic root of 129839320 is about 506.3709050249.

The spelling of 129839320 in words is "one hundred twenty-nine million, eight hundred thirty-nine thousand, three hundred twenty".