729646 has 8 divisors (see below), whose sum is σ = 1104840. Its totient is φ = 361368.

The previous prime is 729643. The next prime is 729649. The reversal of 729646 is 646927.

It is an interprime number because it is at equal distance from previous prime (729643) and next prime (729649).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729643) 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, 1456 + ... + 1891.

It is an arithmetic number, because the mean of its divisors is an integer number (138105).

2⁷²⁹⁶⁴⁶ is an apocalyptic number.

729646 is a deficient number, since it is larger than the sum of its proper divisors (375194).

729646 is a wasteful number, since it uses less digits than its factorization.

729646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3458.

The product of its digits is 18144, while the sum is 34.

The square root of 729646 is about 854.1931865802. The cubic root of 729646 is about 90.0265765135.

The spelling of 729646 in words is "seven hundred twenty-nine thousand, six hundred forty-six".