723328 has 16 divisors (see below), whose sum is σ = 1441260. Its totient is φ = 361600.

The previous prime is 723319. The next prime is 723337. The reversal of 723328 is 823327.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (723319) and next prime (723337).

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

723328 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, 2698 + ... + 2953.

2⁷²³³²⁸ is an apocalyptic number.

It is an amenable number.

723328 is a deficient number, since it is larger than the sum of its proper divisors (717932).

723328 is an equidigital number, since it uses as much as digits as its factorization.

723328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5665 (or 5653 counting only the distinct ones).

The product of its digits is 2016, while the sum is 25.

The square root of 723328 is about 850.4869193586. The cubic root of 723328 is about 89.7659763667.

Subtracting 723328 from its reverse (823327), we obtain a palindrome (99999).

The spelling of 723328 in words is "seven hundred twenty-three thousand, three hundred twenty-eight".