729222 has 16 divisors (see below), whose sum is σ = 1570800. Its totient is φ = 224352.

The previous prime is 729217. The next prime is 729257. The reversal of 729222 is 222927.

It is a junction number, because it is equal to n+sod(n) for n = 729192 and 729201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4597 + ... + 4752.

It is an arithmetic number, because the mean of its divisors is an integer number (98175).

2⁷²⁹²²² is an apocalyptic number.

729222 is an abundant number, since it is smaller than the sum of its proper divisors (841578).

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

729222 is a wasteful number, since it uses less digits than its factorization.

729222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367.

The product of its digits is 1008, while the sum is 24.

The square root of 729222 is about 853.9449630977. The cubic root of 729222 is about 90.0091348753.

The spelling of 729222 in words is "seven hundred twenty-nine thousand, two hundred twenty-two".