129830784 has 64 divisors (see below), whose sum is σ = 346800000. Its totient is φ = 43034112.

The previous prime is 129830783. The next prime is 129830849. The reversal of 129830784 is 487038921.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129830783) 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, 75567 + ... + 77265.

It is an arithmetic number, because the mean of its divisors is an integer number (5418750).

Almost surely, 2^129830784 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 129830784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173400000).

129830784 is an abundant number, since it is smaller than the sum of its proper divisors (216969216).

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

129830784 is a wasteful number, since it uses less digits than its factorization.

129830784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 129830784 is about 11394.3312221473. The cubic root of 129830784 is about 506.3598080353.

The spelling of 129830784 in words is "one hundred twenty-nine million, eight hundred thirty thousand, seven hundred eighty-four".