729668928 has 56 divisors (see below), whose sum is σ = 2014532928. Its totient is φ = 232646656.

The previous prime is 729668921. The next prime is 729668939. The reversal of 729668928 is 829866927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729668921) 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 7 ways as a sum of consecutive naturals, for example, 78201 + ... + 87032.

Almost surely, 2^729668928 is an apocalyptic number.

It is an amenable number.

729668928 is an abundant number, since it is smaller than the sum of its proper divisors (1284864000).

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

729668928 is a wasteful number, since it uses less digits than its factorization.

729668928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165271 (or 165261 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 57.

The square root of 729668928 is about 27012.3847151635. The cubic root of 729668928 is about 900.2751948569.

The spelling of 729668928 in words is "seven hundred twenty-nine million, six hundred sixty-eight thousand, nine hundred twenty-eight".