729805811 has 8 divisors (see below), whose sum is σ = 836267520. Its totient is φ = 623895048.

The previous prime is 729805807. The next prime is 729805823. The reversal of 729805811 is 118508927.

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

It is not a de Polignac number, because 729805811 - 2² = 729805807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729805831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134891 + ... + 140196.

It is an arithmetic number, because the mean of its divisors is an integer number (104533440).

Almost surely, 2^729805811 is an apocalyptic number.

729805811 is a deficient number, since it is larger than the sum of its proper divisors (106461709).

729805811 is a wasteful number, since it uses less digits than its factorization.

729805811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275473.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 729805811 is about 27014.9183045220. The cubic root of 729805811 is about 900.3314873568.

The spelling of 729805811 in words is "seven hundred twenty-nine million, eight hundred five thousand, eight hundred eleven".