729251644 has 12 divisors (see below), whose sum is σ = 1392207768. Its totient is φ = 331478000.

The previous prime is 729251629. The next prime is 729251647. The reversal of 729251644 is 446152927.

It is a junction number, because it is equal to n+sod(n) for n = 729251597 and 729251606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729251647) 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, 8286907 + ... + 8286994.

It is an arithmetic number, because the mean of its divisors is an integer number (116017314).

Almost surely, 2^729251644 is an apocalyptic number.

It is an amenable number.

729251644 is a deficient number, since it is larger than the sum of its proper divisors (662956124).

729251644 is a wasteful number, since it uses less digits than its factorization.

729251644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16573916 (or 16573914 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 729251644 is about 27004.6596719899. The cubic root of 729251644 is about 900.1035452883.

The spelling of 729251644 in words is "seven hundred twenty-nine million, two hundred fifty-one thousand, six hundred forty-four".