729052728 has 64 divisors (see below), whose sum is σ = 1864494720. Its totient is φ = 237494400.

The previous prime is 729052711. The next prime is 729052741. The reversal of 729052728 is 827250927.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 729052728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208918 + ... + 212378.

It is an arithmetic number, because the mean of its divisors is an integer number (29132730).

Almost surely, 2^729052728 is an apocalyptic number.

It is an amenable number.

729052728 is an abundant number, since it is smaller than the sum of its proper divisors (1135441992).

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

729052728 is a wasteful number, since it uses less digits than its factorization.

729052728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668 (or 3664 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 729052728 is about 27000.9764267887. The cubic root of 729052728 is about 900.0216982423.

The spelling of 729052728 in words is "seven hundred twenty-nine million, fifty-two thousand, seven hundred twenty-eight".