129148836 has 12 divisors (see below), whose sum is σ = 301347312. Its totient is φ = 43049608.

The previous prime is 129148829. The next prime is 129148837. The reversal of 129148836 is 638841921.

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

It is not an unprimeable number, because it can be changed into a prime (129148837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381190 + ... + 5381213.

It is an arithmetic number, because the mean of its divisors is an integer number (25112276).

Almost surely, 2^129148836 is an apocalyptic number.

It is an amenable number.

129148836 is an abundant number, since it is smaller than the sum of its proper divisors (172198476).

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

129148836 is a wasteful number, since it uses less digits than its factorization.

129148836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10762410 (or 10762408 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 129148836 is about 11364.3669423334. The cubic root of 129148836 is about 505.4716842515.

The spelling of 129148836 in words is "one hundred twenty-nine million, one hundred forty-eight thousand, eight hundred thirty-six".