729881444 has 24 divisors (see below), whose sum is σ = 1303275960. Its totient is φ = 357537024.

The previous prime is 729881443. The next prime is 729881461. The reversal of 729881444 is 444188927.

It can be written as a sum of positive squares in 4 ways, for example, as 30913600 + 698967844 = 5560^2 + 26438^2 .

It is not an unprimeable number, because it can be changed into a prime (729881443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173672 + ... + 177824.

It is an arithmetic number, because the mean of its divisors is an integer number (54303165).

Almost surely, 2^729881444 is an apocalyptic number.

It is an amenable number.

729881444 is a deficient number, since it is larger than the sum of its proper divisors (573394516).

729881444 is a wasteful number, since it uses less digits than its factorization.

729881444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5039 (or 5037 counting only the distinct ones).

The product of its digits is 516096, while the sum is 47.

The square root of 729881444 is about 27016.3181059152. The cubic root of 729881444 is about 900.3625880589.

The spelling of 729881444 in words is "seven hundred twenty-nine million, eight hundred eighty-one thousand, four hundred forty-four".