724226 has 8 divisors (see below), whose sum is σ = 1091340. Its totient is φ = 360448.

The previous prime is 724219. The next prime is 724259. The reversal of 724226 is 622427.

It can be written as a sum of positive squares in 2 ways, for example, as 724201 + 25 = 851^2 + 5^2 .

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

It is a Curzon number.

It is an unprimeable number.

724226 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 191 + ... + 1218.

2⁷²⁴²²⁶ is an apocalyptic number.

724226 is a deficient number, since it is larger than the sum of its proper divisors (367114).

724226 is a wasteful number, since it uses less digits than its factorization.

724226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its digits is 1344, while the sum is 23.

The square root of 724226 is about 851.0146884749. The cubic root of 724226 is about 89.8031086733.

The spelling of 724226 in words is "seven hundred twenty-four thousand, two hundred twenty-six".