723306 has 8 divisors (see below), whose sum is σ = 1446624. Its totient is φ = 241100.

The previous prime is 723293. The next prime is 723319. The reversal of 723306 is 603327.

It is an interprime number because it is at equal distance from previous prime (723293) and next prime (723319).

It is a sphenic number, since it is the product of 3 distinct primes.

723306 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723306.

It is an unprimeable number.

723306 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 in 3 ways as a sum of consecutive naturals, for example, 60270 + ... + 60281.

It is an arithmetic number, because the mean of its divisors is an integer number (180828).

2⁷²³³⁰⁶ is an apocalyptic number.

723306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

723306 is a wasteful number, since it uses less digits than its factorization.

723306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120556.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 723306 is about 850.4739854928. The cubic root of 723306 is about 89.7650662809.

Adding to 723306 its sum of digits (21), we get a palindrome (723327).

The spelling of 723306 in words is "seven hundred twenty-three thousand, three hundred six".