729805806 has 48 divisors (see below), whose sum is σ = 1597156704. Its totient is φ = 240835392.

The previous prime is 729805799. The next prime is 729805807. The reversal of 729805806 is 608508927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729805807) 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 23 ways as a sum of consecutive naturals, for example, 981871 + ... + 982613.

It is an arithmetic number, because the mean of its divisors is an integer number (33274098).

Almost surely, 2^729805806 is an apocalyptic number.

729805806 is an abundant number, since it is smaller than the sum of its proper divisors (867350898).

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

729805806 is a wasteful number, since it uses less digits than its factorization.

729805806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 729805806 is about 27014.9182119806. The cubic root of 729805806 is about 900.3314853007.

The spelling of 729805806 in words is "seven hundred twenty-nine million, eight hundred five thousand, eight hundred six".