723806 has 4 divisors (see below), whose sum is σ = 1085712. Its totient is φ = 361902.

The previous prime is 723803. The next prime is 723823. The reversal of 723806 is 608327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 608327 = 23 ⋅26449.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723806.

It is not an unprimeable number, because it can be changed into a prime (723803) 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, 180950 + ... + 180953.

It is an arithmetic number, because the mean of its divisors is an integer number (271428).

2⁷²³⁸⁰⁶ is an apocalyptic number.

723806 is a deficient number, since it is larger than the sum of its proper divisors (361906).

723806 is a wasteful number, since it uses less digits than its factorization.

723806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361905.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 723806 is about 850.7678884396. The cubic root of 723806 is about 89.7857454933.

The spelling of 723806 in words is "seven hundred twenty-three thousand, eight hundred six".