729309428 has 12 divisors (see below), whose sum is σ = 1276716672. Its totient is φ = 364533240.

The previous prime is 729309421. The next prime is 729309437. The reversal of 729309428 is 824903927.

729309428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729309421) 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, 16118 + ... + 41453.

It is an arithmetic number, because the mean of its divisors is an integer number (106393056).

Almost surely, 2^729309428 is an apocalyptic number.

It is an amenable number.

729309428 is a deficient number, since it is larger than the sum of its proper divisors (547407244).

729309428 is a wasteful number, since it uses less digits than its factorization.

729309428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60742 (or 60740 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 729309428 is about 27005.7295402291. The cubic root of 729309428 is about 900.1273186135.

The spelling of 729309428 in words is "seven hundred twenty-nine million, three hundred nine thousand, four hundred twenty-eight".