129389568 has 176 divisors, whose sum is σ = 430754304. Its totient is φ = 33546240.

The previous prime is 129389551. The next prime is 129389587. The reversal of 129389568 is 865983921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (176).

It is a self number, because there is not a number n which added to its sum of digits gives 129389568.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236271 + ... + 236817.

Almost surely, 2^129389568 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 129389568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215377152).

129389568 is an abundant number, since it is smaller than the sum of its proper divisors (301364736).

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

129389568 is a wasteful number, since it uses less digits than its factorization.

129389568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 570 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 129389568 is about 11374.9535383667. The cubic root of 129389568 is about 505.7855538562.

The spelling of 129389568 in words is "one hundred twenty-nine million, three hundred eighty-nine thousand, five hundred sixty-eight".