726224 has 10 divisors (see below), whose sum is σ = 1407090. Its totient is φ = 363104.

The previous prime is 726221. The next prime is 726287. The reversal of 726224 is 422627.

It can be written as a sum of positive squares in only one way, i.e., 672400 + 53824 = 820^2 + 232^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 726224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22679 + ... + 22710.

It is an arithmetic number, because the mean of its divisors is an integer number (140709).

2⁷²⁶²²⁴ is an apocalyptic number.

It is an amenable number.

726224 is a deficient number, since it is larger than the sum of its proper divisors (680866).

726224 is a wasteful number, since it uses less digits than its factorization.

726224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45397 (or 45391 counting only the distinct ones).

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

The square root of 726224 is about 852.1877727356. The cubic root of 726224 is about 89.8856160040.

The spelling of 726224 in words is "seven hundred twenty-six thousand, two hundred twenty-four".