129733408 has 48 divisors (see below), whose sum is σ = 298710720. Its totient is φ = 54302976.

The previous prime is 129733403. The next prime is 129733441. The reversal of 129733408 is 804337921.

It is not an unprimeable number, because it can be changed into a prime (129733403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2898 + ... + 16366.

It is an arithmetic number, because the mean of its divisors is an integer number (6223140).

Almost surely, 2^129733408 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 129733408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149355360).

129733408 is an abundant number, since it is smaller than the sum of its proper divisors (168977312).

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

129733408 is a wasteful number, since it uses less digits than its factorization.

129733408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13529 (or 13521 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 129733408 is about 11390.0574186437. The cubic root of 129733408 is about 506.2331826350.

The spelling of 129733408 in words is "one hundred twenty-nine million, seven hundred thirty-three thousand, four hundred eight".