129872644 has 24 divisors (see below), whose sum is σ = 249213888. Its totient is φ = 58729440.

The previous prime is 129872593. The next prime is 129872653. The reversal of 129872644 is 446278921.

It is a self number, because there is not a number n which added to its sum of digits gives 129872644.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1177 + ... + 16159.

It is an arithmetic number, because the mean of its divisors is an integer number (10383912).

Almost surely, 2^129872644 is an apocalyptic number.

It is an amenable number.

129872644 is a deficient number, since it is larger than the sum of its proper divisors (119341244).

129872644 is a wasteful number, since it uses less digits than its factorization.

129872644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15195 (or 15193 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 129872644 is about 11396.1679524303. The cubic root of 129872644 is about 506.4142223103.

The spelling of 129872644 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, six hundred forty-four".