724544 has 14 divisors (see below), whose sum is σ = 1437894. Its totient is φ = 362240.

The previous prime is 724531. The next prime is 724547. The reversal of 724544 is 445427.

It can be written as a sum of positive squares in only one way, i.e., 462400 + 262144 = 680^2 + 512^2 .

It is not an unprimeable number, because it can be changed into a prime (724547) by changing a digit.

724544 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 as a sum of consecutive naturals, namely, 5597 + ... + 5724.

2⁷²⁴⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

724544 is a deficient number, since it is larger than the sum of its proper divisors (713350).

724544 is a wasteful number, since it uses less digits than its factorization.

724544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11333 (or 11323 counting only the distinct ones).

The product of its digits is 4480, while the sum is 26.

The square root of 724544 is about 851.2015037581. The cubic root of 724544 is about 89.8162506160.

The spelling of 724544 in words is "seven hundred twenty-four thousand, five hundred forty-four".