129340800 has 240 divisors, whose sum is σ = 478252500. Its totient is φ = 34421760.

The previous prime is 129340769. The next prime is 129340819. The reversal of 129340800 is 8043921.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 258951 + ... + 259449.

Almost surely, 2^129340800 is an apocalyptic number.

129340800 is a gapful number since it is divisible by the number (10) 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 129340800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239126250).

129340800 is an abundant number, since it is smaller than the sum of its proper divisors (348911700).

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

129340800 is an equidigital number, since it uses as much as digits as its factorization.

129340800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 129340800 is about 11372.8096792305. The cubic root of 129340800 is about 505.7220009493.

The spelling of 129340800 in words is "one hundred twenty-nine million, three hundred forty thousand, eight hundred".