129724068 has 12 divisors (see below), whose sum is σ = 302689520. Its totient is φ = 43241352.

The previous prime is 129724051. The next prime is 129724069. The reversal of 129724068 is 860427921.

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 (129724069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5405158 + ... + 5405181.

Almost surely, 2^129724068 is an apocalyptic number.

It is an amenable number.

129724068 is an abundant number, since it is smaller than the sum of its proper divisors (172965452).

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

129724068 is a wasteful number, since it uses less digits than its factorization.

129724068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10810346 (or 10810344 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 129724068 is about 11389.6474045512. The cubic root of 129724068 is about 506.2210337946.

The spelling of 129724068 in words is "one hundred twenty-nine million, seven hundred twenty-four thousand, sixty-eight".