729658 has 4 divisors (see below), whose sum is σ = 1094490. Its totient is φ = 364828.

The previous prime is 729649. The next prime is 729661. The reversal of 729658 is 856927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 466489 + 263169 = 683^2 + 513^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182413 + ... + 182416.

2⁷²⁹⁶⁵⁸ is an apocalyptic number.

729658 is a deficient number, since it is larger than the sum of its proper divisors (364832).

729658 is a wasteful number, since it uses less digits than its factorization.

729658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364831.

The product of its digits is 30240, while the sum is 37.

The square root of 729658 is about 854.2002107235. The cubic root of 729658 is about 90.0270700464.

It can be divided in two parts, 72 and 9658, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 729658 in words is "seven hundred twenty-nine thousand, six hundred fifty-eight".