726686 has 4 divisors (see below), whose sum is σ = 1090032. Its totient is φ = 363342.

The previous prime is 726679. The next prime is 726689. The reversal of 726686 is 686627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686627 = 41 ⋅16747.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181670 + ... + 181673.

It is an arithmetic number, because the mean of its divisors is an integer number (272508).

2⁷²⁶⁶⁸⁶ is an apocalyptic number.

726686 is a deficient number, since it is larger than the sum of its proper divisors (363346).

726686 is a wasteful number, since it uses less digits than its factorization.

726686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363345.

The product of its digits is 24192, while the sum is 35.

The square root of 726686 is about 852.4587966582. The cubic root of 726686 is about 89.9046727283.

The spelling of 726686 in words is "seven hundred twenty-six thousand, six hundred eighty-six".