129912832 has 104 divisors (see below), whose sum is σ = 311389056. Its totient is φ = 52985856.

The previous prime is 129912817. The next prime is 129912833. The reversal of 129912832 is 238219921.

It is a junction number, because it is equal to n+sod(n) for n = 129912791 and 129912800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129912833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659358 + ... + 659554.

Almost surely, 2^129912832 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 129912832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155694528).

129912832 is an abundant number, since it is smaller than the sum of its proper divisors (181476224).

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

129912832 is an equidigital number, since it uses as much as digits as its factorization.

129912832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 229 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 129912832 is about 11397.9310403248. The cubic root of 129912832 is about 506.4664521340.

The spelling of 129912832 in words is "one hundred twenty-nine million, nine hundred twelve thousand, eight hundred thirty-two".