729221022 has 16 divisors (see below), whose sum is σ = 1620491280. Its totient is φ = 243073656.

The previous prime is 729220993. The next prime is 729221033. The reversal of 729221022 is 220122927.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6751993 + ... + 6752100.

It is an arithmetic number, because the mean of its divisors is an integer number (101280705).

Almost surely, 2^729221022 is an apocalyptic number.

729221022 is an abundant number, since it is smaller than the sum of its proper divisors (891270258).

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

729221022 is a wasteful number, since it uses less digits than its factorization.

729221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504104 (or 13504098 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 729221022 is about 27004.0926898128. The cubic root of 729221022 is about 900.0909463650.

Adding to 729221022 its reverse (220122927), we get a palindrome (949343949).

The spelling of 729221022 in words is "seven hundred twenty-nine million, two hundred twenty-one thousand, twenty-two".