729136818 has 24 divisors (see below), whose sum is σ = 1662944400. Its totient is φ = 230253624.

The previous prime is 729136781. The next prime is 729136831. The reversal of 729136818 is 818631927.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065648 + ... + 1066331.

It is an arithmetic number, because the mean of its divisors is an integer number (69289350).

Almost surely, 2^729136818 is an apocalyptic number.

729136818 is an abundant number, since it is smaller than the sum of its proper divisors (933807582).

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

729136818 is a wasteful number, since it uses less digits than its factorization.

729136818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132006 (or 2132003 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 729136818 is about 27002.5335477988. The cubic root of 729136818 is about 900.0563001817.

The spelling of 729136818 in words is "seven hundred twenty-nine million, one hundred thirty-six thousand, eight hundred eighteen".