129383272 has 16 divisors (see below), whose sum is σ = 242726400. Its totient is φ = 64656240.

The previous prime is 129383251. The next prime is 129383291. The reversal of 129383272 is 272383921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17497 + ... + 23767.

It is an arithmetic number, because the mean of its divisors is an integer number (15170400).

Almost surely, 2^129383272 is an apocalyptic number.

It is an amenable number.

129383272 is a deficient number, since it is larger than the sum of its proper divisors (113343128).

129383272 is a wasteful number, since it uses less digits than its factorization.

129383272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856 (or 8852 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 129383272 is about 11374.6767866168. The cubic root of 129383272 is about 505.7773500070. Note that the first 3 decimals are identical.

The spelling of 129383272 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, two hundred seventy-two".