129366844 has 24 divisors (see below), whose sum is σ = 234405248. Its totient is φ = 62406720.

The previous prime is 129366841. The next prime is 129366857. The reversal of 129366844 is 448663921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129366844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129366841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44854 + ... + 47650.

Almost surely, 2^129366844 is an apocalyptic number.

It is an amenable number.

129366844 is a deficient number, since it is larger than the sum of its proper divisors (105038404).

129366844 is a wasteful number, since it uses less digits than its factorization.

129366844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205 (or 3203 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 129366844 is about 11373.9546332839. The cubic root of 129366844 is about 505.7559426492.

The spelling of 129366844 in words is "one hundred twenty-nine million, three hundred sixty-six thousand, eight hundred forty-four".