129785344 has 160 divisors (see below), whose sum is σ = 313479936. Its totient is φ = 53084160.

The previous prime is 129785317. The next prime is 129785363. The reversal of 129785344 is 443587921.

It is a self number, because there is not a number n which added to its sum of digits gives 129785344.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3507694 + ... + 3507730.

Almost surely, 2^129785344 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 129785344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156739968).

129785344 is an abundant number, since it is smaller than the sum of its proper divisors (183694592).

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

129785344 is a wasteful number, since it uses less digits than its factorization.

129785344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 100 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 129785344 is about 11392.3370736649. The cubic root of 129785344 is about 506.3007268379.

The spelling of 129785344 in words is "one hundred twenty-nine million, seven hundred eighty-five thousand, three hundred forty-four".