129385744 has 40 divisors (see below), whose sum is σ = 271034240. Its totient is φ = 59626368.

The previous prime is 129385699. The next prime is 129385771. The reversal of 129385744 is 447583921.

It is a self number, because there is not a number n which added to its sum of digits gives 129385744.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5497 + ... + 16999.

It is an arithmetic number, because the mean of its divisors is an integer number (6775856).

Almost surely, 2^129385744 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 129385744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135517120).

129385744 is an abundant number, since it is smaller than the sum of its proper divisors (141648496).

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

129385744 is a wasteful number, since it uses less digits than its factorization.

129385744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11567 (or 11561 counting only the distinct ones).

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

The square root of 129385744 is about 11374.7854485261. The cubic root of 129385744 is about 505.7805711180.

The spelling of 129385744 in words is "one hundred twenty-nine million, three hundred eighty-five thousand, seven hundred forty-four".