129808 has 40 divisors (see below), whose sum is σ = 307520. Its totient is φ = 51840.

The previous prime is 129803. The next prime is 129841. The reversal of 129808 is 808921.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (129803) 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, 2098 + ... + 2158.

It is an arithmetic number, because the mean of its divisors is an integer number (7688).

2¹²⁹⁸⁰⁸ 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 129808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153760).

129808 is an abundant number, since it is smaller than the sum of its proper divisors (177712).

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

129808 is a wasteful number, since it uses less digits than its factorization.

129808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 129808 is about 360.2887730696. The cubic root of 129808 is about 50.6330185947.

The spelling of 129808 in words is "one hundred twenty-nine thousand, eight hundred eight".