729342 has 12 divisors (see below), whose sum is σ = 1580280. Its totient is φ = 243108.

The previous prime is 729331. The next prime is 729359. The reversal of 729342 is 243927.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729342.

It is an unprimeable number.

729342 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 (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20242 + ... + 20277.

It is an arithmetic number, because the mean of its divisors is an integer number (131690).

2⁷²⁹³⁴² is an apocalyptic number.

729342 is an abundant number, since it is smaller than the sum of its proper divisors (850938).

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

729342 is a wasteful number, since it uses less digits than its factorization.

729342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40527 (or 40524 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 729342 is about 854.0152223468. The cubic root of 729342 is about 90.0140718738.

The spelling of 729342 in words is "seven hundred twenty-nine thousand, three hundred forty-two".