723320 has 48 divisors (see below), whose sum is σ = 1778760. Its totient is φ = 264576.

The previous prime is 723319. The next prime is 723337. The reversal of 723320 is 23327.

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 723320.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6707 + ... + 6813.

2⁷²³³²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (889380).

723320 is an abundant number, since it is smaller than the sum of its proper divisors (1055440).

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

723320 is a wasteful number, since it uses less digits than its factorization.

723320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 723320 is about 850.4822161574. The cubic root of 723320 is about 89.7656454285.

Adding to 723320 its reverse (23327), we get a palindrome (746647).

The spelling of 723320 in words is "seven hundred twenty-three thousand, three hundred twenty", and thus it is an iban number.