726736 has 20 divisors (see below), whose sum is σ = 1436292. Its totient is φ = 356096.

The previous prime is 726707. The next prime is 726751. The reversal of 726736 is 637627.

726736 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 608400 + 118336 = 780^2 + 344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 726698 and 726707.

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, 420 + ... + 1276.

2⁷²⁶⁷³⁶ is an apocalyptic number.

It is an amenable number.

726736 is a deficient number, since it is larger than the sum of its proper divisors (709556).

726736 is a wasteful number, since it uses less digits than its factorization.

726736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 912 counting only the distinct ones).

The product of its digits is 10584, while the sum is 31.

The square root of 726736 is about 852.4881230844. The cubic root of 726736 is about 89.9067346600.

The spelling of 726736 in words is "seven hundred twenty-six thousand, seven hundred thirty-six".