129579912 has 320 divisors, whose sum is σ = 470448000. Its totient is φ = 33022080.

The previous prime is 129579881. The next prime is 129579929. The reversal of 129579912 is 219975921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2444878 + ... + 2444930.

It is an arithmetic number, because the mean of its divisors is an integer number (1470150).

Almost surely, 2^129579912 is an apocalyptic number.

129579912 is a gapful number since it is divisible by the number (12) 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 129579912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235224000).

129579912 is an abundant number, since it is smaller than the sum of its proper divisors (340868088).

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

129579912 is a wasteful number, since it uses less digits than its factorization.

129579912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 76 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 129579912 is about 11383.3172669482. The cubic root of 129579912 is about 506.0334514174.

The spelling of 129579912 in words is "one hundred twenty-nine million, five hundred seventy-nine thousand, nine hundred twelve".