129808854 has 48 divisors (see below), whose sum is σ = 326720160. Its totient is φ = 36478080.

The previous prime is 129808853. The next prime is 129808891. The reversal of 129808854 is 458808921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129808853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 759 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (6806670).

Almost surely, 2^129808854 is an apocalyptic number.

129808854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129808854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163360080).

129808854 is an abundant number, since it is smaller than the sum of its proper divisors (196911306).

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

129808854 is a wasteful number, since it uses less digits than its factorization.

129808854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16965 (or 16962 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 129808854 is about 11393.3688608769. The cubic root of 129808854 is about 506.3312963179.

The spelling of 129808854 in words is "one hundred twenty-nine million, eight hundred eight thousand, eight hundred fifty-four".