729858 has 16 divisors (see below), whose sum is σ = 1475136. Its totient is φ = 240720.

The previous prime is 729851. The next prime is 729871. The reversal of 729858 is 858927.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729858.

It is not an unprimeable number, because it can be changed into a prime (729851) by changing a digit.

729858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 28 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (92196).

2⁷²⁹⁸⁵⁸ is an apocalyptic number.

729858 is an abundant number, since it is smaller than the sum of its proper divisors (745278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

729858 is a wasteful number, since it uses less digits than its factorization.

729858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289.

The product of its digits is 40320, while the sum is 39.

The square root of 729858 is about 854.3172712757. The cubic root of 729858 is about 90.0352947988.

The spelling of 729858 in words is "seven hundred twenty-nine thousand, eight hundred fifty-eight".