129636224 has 32 divisors (see below), whose sum is σ = 262509240. Its totient is φ = 63751680.

The previous prime is 129636217. The next prime is 129636253. The reversal of 129636224 is 422636921.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 16109.

Almost surely, 2^129636224 is an apocalyptic number.

It is an amenable number.

129636224 is an abundant number, since it is smaller than the sum of its proper divisors (132873016).

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

129636224 is an equidigital number, since it uses as much as digits as its factorization.

129636224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16678 (or 16666 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 129636224 is about 11385.7904424770. The cubic root of 129636224 is about 506.1067437162.

The spelling of 129636224 in words is "one hundred twenty-nine million, six hundred thirty-six thousand, two hundred twenty-four".