729523328 has 32 divisors (see below), whose sum is σ = 1458779520. Its totient is φ = 363398400.

The previous prime is 729523321. The next prime is 729523349. The reversal of 729523328 is 823325927.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (729523321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24173 + ... + 45203.

It is an arithmetic number, because the mean of its divisors is an integer number (45586860).

Almost surely, 2^729523328 is an apocalyptic number.

It is an amenable number.

729523328 is a deficient number, since it is larger than the sum of its proper divisors (729256192).

729523328 is a wasteful number, since it uses less digits than its factorization.

729523328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21316 (or 21304 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 729523328 is about 27009.6895206146. The cubic root of 729523328 is about 900.2153098035.

The spelling of 729523328 in words is "seven hundred twenty-nine million, five hundred twenty-three thousand, three hundred twenty-eight".