129918768 has 80 divisors (see below), whose sum is σ = 395974656. Its totient is φ = 35919360.

The previous prime is 129918749. The next prime is 129918779. The reversal of 129918768 is 867819921.

It is a self number, because there is not a number n which added to its sum of digits gives 129918768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4180 + ... + 16652.

Almost surely, 2^129918768 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 129918768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197987328).

129918768 is an abundant number, since it is smaller than the sum of its proper divisors (266055888).

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

129918768 is a wasteful number, since it uses less digits than its factorization.

129918768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12522 (or 12516 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The square root of 129918768 is about 11398.1914354866. The cubic root of 129918768 is about 506.4741658679.

The spelling of 129918768 in words is "one hundred twenty-nine million, nine hundred eighteen thousand, seven hundred sixty-eight".