729881438 has 24 divisors (see below), whose sum is σ = 1295974344. Its totient is φ = 306242640.

The previous prime is 729881437. The next prime is 729881443. The reversal of 729881438 is 834188927.

729881438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729881431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112856 + ... + 119147.

It is an arithmetic number, because the mean of its divisors is an integer number (53998931).

Almost surely, 2^729881438 is an apocalyptic number.

729881438 is a deficient number, since it is larger than the sum of its proper divisors (566092906).

729881438 is a wasteful number, since it uses less digits than its factorization.

729881438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232040 (or 232029 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 729881438 is about 27016.3179948712. The cubic root of 729881438 is about 900.3625855917.

The spelling of 729881438 in words is "seven hundred twenty-nine million, eight hundred eighty-one thousand, four hundred thirty-eight".