129039384 has 64 divisors (see below), whose sum is σ = 356451840. Its totient is φ = 38720000.

The previous prime is 129039377. The next prime is 129039389. The reversal of 129039384 is 483930921.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129039389) 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, 2509 + ... + 16259.

It is an arithmetic number, because the mean of its divisors is an integer number (5569560).

Almost surely, 2^129039384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129039384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178225920).

129039384 is an abundant number, since it is smaller than the sum of its proper divisors (227412456).

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

129039384 is a wasteful number, since it uses less digits than its factorization.

129039384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800 (or 13796 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 129039384 is about 11359.5503432134. The cubic root of 129039384 is about 505.3288502807.

The spelling of 129039384 in words is "one hundred twenty-nine million, thirty-nine thousand, three hundred eighty-four".