129072568 has 32 divisors (see below), whose sum is σ = 258627600. Its totient is φ = 60175872.

The previous prime is 129072557. The next prime is 129072577. The reversal of 129072568 is 865270921.

It is a super-2 number, since 2×129072568² = 33319455620229248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129072568.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10471 + ... + 19177.

Almost surely, 2^129072568 is an apocalyptic number.

It is an amenable number.

129072568 is an abundant number, since it is smaller than the sum of its proper divisors (129555032).

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

129072568 is a wasteful number, since it uses less digits than its factorization.

129072568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839 (or 8835 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 129072568 is about 11361.0108705168. The cubic root of 129072568 is about 505.3721636600.

The spelling of 129072568 in words is "one hundred twenty-nine million, seventy-two thousand, five hundred sixty-eight".