129508470 has 240 divisors, whose sum is σ = 437987088. Its totient is φ = 27216000.

The previous prime is 129508447. The next prime is 129508471. The reversal of 129508470 is 74805921.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129508471) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 515845 + ... + 516095.

Almost surely, 2^129508470 is an apocalyptic number.

129508470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129508470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218993544).

129508470 is an abundant number, since it is smaller than the sum of its proper divisors (308478618).

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

129508470 is a wasteful number, since it uses less digits than its factorization.

129508470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 129508470 is about 11380.1788210906. The cubic root of 129508470 is about 505.9404362597.

The spelling of 129508470 in words is "one hundred twenty-nine million, five hundred eight thousand, four hundred seventy".