129488320 has 112 divisors (see below), whose sum is σ = 351787968. Its totient is φ = 44974080.

The previous prime is 129488267. The next prime is 129488323. The reversal of 129488320 is 23884921.

It is a self number, because there is not a number n which added to its sum of digits gives 129488320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129488323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69805 + ... + 71635.

It is an arithmetic number, because the mean of its divisors is an integer number (3140964).

Almost surely, 2^129488320 is an apocalyptic number.

129488320 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 129488320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175893984).

129488320 is an abundant number, since it is smaller than the sum of its proper divisors (222299648).

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

129488320 is a wasteful number, since it uses less digits than its factorization.

129488320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 129488320 is about 11379.2934754316. The cubic root of 129488320 is about 505.9141954315.

The spelling of 129488320 in words is "one hundred twenty-nine million, four hundred eighty-eight thousand, three hundred twenty".