129944568 has 64 divisors (see below), whose sum is σ = 353152800. Its totient is φ = 39605760.

The previous prime is 129944543. The next prime is 129944569. The reversal of 129944568 is 865449921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129944569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32098 + ... + 35918.

Almost surely, 2^129944568 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 129944568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176576400).

129944568 is an abundant number, since it is smaller than the sum of its proper divisors (223208232).

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

129944568 is a wasteful number, since it uses less digits than its factorization.

129944568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952 (or 3948 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 129944568 is about 11399.3231378008. The cubic root of 129944568 is about 506.5076898122.

The spelling of 129944568 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, five hundred sixty-eight".