129336828 has 12 divisors (see below), whose sum is σ = 301785960. Its totient is φ = 43112272.

The previous prime is 129336817. The next prime is 129336829. The reversal of 129336828 is 828633921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 129336828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129336829) 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 3 ways as a sum of consecutive naturals, for example, 5389023 + ... + 5389046.

It is an arithmetic number, because the mean of its divisors is an integer number (25148830).

Almost surely, 2^129336828 is an apocalyptic number.

It is an amenable number.

129336828 is an abundant number, since it is smaller than the sum of its proper divisors (172449132).

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

129336828 is a wasteful number, since it uses less digits than its factorization.

129336828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778076 (or 10778074 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 129336828 is about 11372.6350508578. The cubic root of 129336828 is about 505.7168240617.

The spelling of 129336828 in words is "one hundred twenty-nine million, three hundred thirty-six thousand, eight hundred twenty-eight".