129868080 has 80 divisors (see below), whose sum is σ = 404974080. Its totient is φ = 34426624.

The previous prime is 129868069. The next prime is 129868091. The reversal of 129868080 is 80868921.

It is an interprime number because it is at equal distance from previous prime (129868069) and next prime (129868091).

It is a tau number, because it is divible by the number of its divisors (80).

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, 41449 + ... + 44471.

It is an arithmetic number, because the mean of its divisors is an integer number (5062176).

Almost surely, 2^129868080 is an apocalyptic number.

129868080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129868080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202487040).

129868080 is an abundant number, since it is smaller than the sum of its proper divisors (275106000).

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

129868080 is a wasteful number, since it uses less digits than its factorization.

129868080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 129868080 is about 11395.9677079220. The cubic root of 129868080 is about 506.4082900844.

It can be divided in two parts, 1298 and 68080, that added together give a triangular number (69378 = T₃₇₂).

The spelling of 129868080 in words is "one hundred twenty-nine million, eight hundred sixty-eight thousand, eighty".