129333968 has 40 divisors (see below), whose sum is σ = 270518400. Its totient is φ = 59717504.

The previous prime is 129333961. The next prime is 129333983. The reversal of 129333968 is 869333921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129333961) 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, 4613 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (6762960).

Almost surely, 2^129333968 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 129333968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135259200).

129333968 is an abundant number, since it is smaller than the sum of its proper divisors (141184432).

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

129333968 is a wasteful number, since it uses less digits than its factorization.

129333968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12179 (or 12173 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 129333968 is about 11372.5093097346. The cubic root of 129333968 is about 505.7130964285.

The spelling of 129333968 in words is "one hundred twenty-nine million, three hundred thirty-three thousand, nine hundred sixty-eight".