129707832 has 32 divisors (see below), whose sum is σ = 341337600. Its totient is φ = 40960224.

The previous prime is 129707821. The next prime is 129707839. The reversal of 129707832 is 238707921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129707839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141768 + ... + 142679.

It is an arithmetic number, because the mean of its divisors is an integer number (10666800).

Almost surely, 2^129707832 is an apocalyptic number.

129707832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129707832 is an abundant number, since it is smaller than the sum of its proper divisors (211629768).

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

129707832 is a wasteful number, since it uses less digits than its factorization.

129707832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284475 (or 284471 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 129707832 is about 11388.9346297184. The cubic root of 129707832 is about 506.1999137158.

It can be divided in two parts, 12970 and 7832, that added together give a palindrome (20802).

The spelling of 129707832 in words is "one hundred twenty-nine million, seven hundred seven thousand, eight hundred thirty-two".