129801888 has 72 divisors (see below), whose sum is σ = 375429600. Its totient is φ = 42528384.

The previous prime is 129801871. The next prime is 129801899. The reversal of 129801888 is 888108921.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13173 + ... + 20811.

It is an arithmetic number, because the mean of its divisors is an integer number (5214300).

Almost surely, 2^129801888 is an apocalyptic number.

129801888 is a gapful number since it is divisible by the number (18) 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 129801888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187714800).

129801888 is an abundant number, since it is smaller than the sum of its proper divisors (245627712).

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

129801888 is a wasteful number, since it uses less digits than its factorization.

129801888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The square root of 129801888 is about 11393.0631526381. The cubic root of 129801888 is about 506.3222389827.

The spelling of 129801888 in words is "one hundred twenty-nine million, eight hundred one thousand, eight hundred eighty-eight".