129384020 has 24 divisors (see below), whose sum is σ = 271971168. Its totient is φ = 51703200.

The previous prime is 129384019. The next prime is 129384023. The reversal of 129384020 is 20483921.

It is a Smith number, since the sum of its digits (29) 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 (129384023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23315 + ... + 28325.

It is an arithmetic number, because the mean of its divisors is an integer number (11332132).

Almost surely, 2^129384020 is an apocalyptic number.

129384020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129384020 is an abundant number, since it is smaller than the sum of its proper divisors (142587148).

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

129384020 is a wasteful number, since it uses less digits than its factorization.

129384020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311 (or 6309 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 129384020 is about 11374.7096666245. The cubic root of 129384020 is about 505.7783246841.

The spelling of 129384020 in words is "one hundred twenty-nine million, three hundred eighty-four thousand, twenty".