129826312 has 64 divisors (see below), whose sum is σ = 304819200. Its totient is φ = 50360640.

The previous prime is 129826289. The next prime is 129826313. The reversal of 129826312 is 213628921.

129826312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (129826313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257853 + ... + 258355.

It is an arithmetic number, because the mean of its divisors is an integer number (4762800).

Almost surely, 2^129826312 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 129826312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152409600).

129826312 is an abundant number, since it is smaller than the sum of its proper divisors (174992888).

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

129826312 is a wasteful number, since it uses less digits than its factorization.

129826312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 942 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 129826312 is about 11394.1349825250. The cubic root of 129826312 is about 506.3539941418.

The spelling of 129826312 in words is "one hundred twenty-nine million, eight hundred twenty-six thousand, three hundred twelve".