729226 has 8 divisors (see below), whose sum is σ = 1120644. Its totient is φ = 355680.

The previous prime is 729217. The next prime is 729257. The reversal of 729226 is 622927.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 159201 = 755^2 + 399^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 729194 and 729203.

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 3 ways as a sum of consecutive naturals, for example, 4365 + ... + 4528.

2⁷²⁹²²⁶ is an apocalyptic number.

729226 is a deficient number, since it is larger than the sum of its proper divisors (391418).

729226 is a wasteful number, since it uses less digits than its factorization.

729226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936.

The product of its digits is 3024, while the sum is 28.

The square root of 729226 is about 853.9473051658. The cubic root of 729226 is about 90.0092994506.

The spelling of 729226 in words is "seven hundred twenty-nine thousand, two hundred twenty-six".