729730 has 8 divisors (see below), whose sum is σ = 1313532. Its totient is φ = 291888.

The previous prime is 729719. The next prime is 729737. The reversal of 729730 is 37927.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 717409 + 12321 = 847^2 + 111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (729737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36477 + ... + 36496.

2⁷²⁹⁷³⁰ is an apocalyptic number.

729730 is a deficient number, since it is larger than the sum of its proper divisors (583802).

729730 is a wasteful number, since it uses less digits than its factorization.

729730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72980.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 729730 is about 854.2423543702. The cubic root of 729730 is about 90.0300311304.

The spelling of 729730 in words is "seven hundred twenty-nine thousand, seven hundred thirty".