726718 has 4 divisors (see below), whose sum is σ = 1090080. Its totient is φ = 363358.

The previous prime is 726707. The next prime is 726751. The reversal of 726718 is 817627.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 726718.

It is a congruent number.

It is an unprimeable number.

726718 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181678 + ... + 181681.

It is an arithmetic number, because the mean of its divisors is an integer number (272520).

2⁷²⁶⁷¹⁸ is an apocalyptic number.

726718 is a deficient number, since it is larger than the sum of its proper divisors (363362).

726718 is a wasteful number, since it uses less digits than its factorization.

726718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363361.

The product of its digits is 4704, while the sum is 31.

The square root of 726718 is about 852.4775656872. The cubic root of 726718 is about 89.9059923755.

Subtracting 726718 from its reverse (817627), we obtain a palindrome (90909).

It can be divided in two parts, 726 and 718, that added together give a square (1444 = 38²).

The spelling of 726718 in words is "seven hundred twenty-six thousand, seven hundred eighteen".