129816336 has 80 divisors (see below), whose sum is σ = 363587840. Its totient is φ = 39911040.

The previous prime is 129816331. The next prime is 129816377. The reversal of 129816336 is 633618921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 129816294 and 129816303.

It is not an unprimeable number, because it can be changed into a prime (129816331) 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, 104841 + ... + 106071.

It is an arithmetic number, because the mean of its divisors is an integer number (4544848).

Almost surely, 2^129816336 is an apocalyptic number.

129816336 is a gapful number since it is divisible by the number (16) 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 129816336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181793920).

129816336 is an abundant number, since it is smaller than the sum of its proper divisors (233771504).

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

129816336 is a wasteful number, since it uses less digits than its factorization.

129816336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281 (or 1249 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 129816336 is about 11393.6972050340. The cubic root of 129816336 is about 506.3410242059.

The spelling of 129816336 in words is "one hundred twenty-nine million, eight hundred sixteen thousand, three hundred thirty-six".