129957328 has 20 divisors (see below), whose sum is σ = 255921988. Its totient is φ = 63912960.

The previous prime is 129957293. The next prime is 129957329. The reversal of 129957328 is 823759921.

It can be written as a sum of positive squares in 2 ways, for example, as 8340544 + 121616784 = 2888^2 + 11028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129957329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65601 + ... + 67552.

Almost surely, 2^129957328 is an apocalyptic number.

It is an amenable number.

129957328 is a deficient number, since it is larger than the sum of its proper divisors (125964660).

129957328 is a wasteful number, since it uses less digits than its factorization.

129957328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133222 (or 133216 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 129957328 is about 11399.8828064152. The cubic root of 129957328 is about 506.5242682314.

The spelling of 129957328 in words is "one hundred twenty-nine million, nine hundred fifty-seven thousand, three hundred twenty-eight".