726724 has 12 divisors (see below), whose sum is σ = 1285564. Its totient is φ = 359424.

The previous prime is 726707. The next prime is 726751. The reversal of 726724 is 427627.

It can be written as a sum of positive squares in 2 ways, for example, as 136900 + 589824 = 370^2 + 768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 726692 and 726701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549 + ... + 1324.

2⁷²⁶⁷²⁴ is an apocalyptic number.

It is an amenable number.

726724 is a deficient number, since it is larger than the sum of its proper divisors (558840).

726724 is a wasteful number, since it uses less digits than its factorization.

726724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974 (or 1972 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 726724 is about 852.4810848341. The cubic root of 726724 is about 89.9062398050.

The spelling of 726724 in words is "seven hundred twenty-six thousand, seven hundred twenty-four".