726536 has 16 divisors (see below), whose sum is σ = 1372140. Its totient is φ = 360640.

The previous prime is 726533. The next prime is 726559. The reversal of 726536 is 635627.

726536 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 37636 = 830^2 + 194^2 .

It is a junction number, because it is equal to n+sod(n) for n = 726499 and 726508.

It is not an unprimeable number, because it can be changed into a prime (726533) by changing a digit.

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, 1346 + ... + 1806.

2⁷²⁶⁵³⁶ is an apocalyptic number.

It is an amenable number.

726536 is a deficient number, since it is larger than the sum of its proper divisors (645604).

726536 is a wasteful number, since it uses less digits than its factorization.

726536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 660 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 726536 is about 852.3708113257. The cubic root of 726536 is about 89.8984863659.

Subtracting from 726536 its reverse (635627), we obtain a palindrome (90909).

The spelling of 726536 in words is "seven hundred twenty-six thousand, five hundred thirty-six".