129959808 has 96 divisors (see below), whose sum is σ = 379576680. Its totient is φ = 39367680.

The previous prime is 129959807. The next prime is 129959827. The reversal of 129959808 is 808959921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129959807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45066 + ... + 47862.

Almost surely, 2^129959808 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 129959808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189788340).

129959808 is an abundant number, since it is smaller than the sum of its proper divisors (249616872).

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

129959808 is a wasteful number, since it uses less digits than its factorization.

129959808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 51.

The square root of 129959808 is about 11399.9915789443. The cubic root of 129959808 is about 506.5274902434.

The spelling of 129959808 in words is "one hundred twenty-nine million, nine hundred fifty-nine thousand, eight hundred eight".