726838 has 16 divisors (see below), whose sum is σ = 1257120. Its totient is φ = 308736.

The previous prime is 726811. The next prime is 726839. The reversal of 726838 is 838627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726839) by changing a digit.

726838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 7 ways as a sum of consecutive naturals, for example, 2568 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (78570).

2⁷²⁶⁸³⁸ is an apocalyptic number.

726838 is a deficient number, since it is larger than the sum of its proper divisors (530282).

726838 is a wasteful number, since it uses less digits than its factorization.

726838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471.

The product of its digits is 16128, while the sum is 34.

The square root of 726838 is about 852.5479458658. The cubic root of 726838 is about 89.9109407072.

The spelling of 726838 in words is "seven hundred twenty-six thousand, eight hundred thirty-eight".