720320 has 28 divisors (see below), whose sum is σ = 1716024. Its totient is φ = 288000.

The previous prime is 720319. The next prime is 720359. The reversal of 720320 is 23027.

It is a junction number, because it is equal to n+sod(n) for n = 720295 and 720304.

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 720320.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 806 + ... + 1445.

2⁷²⁰³²⁰ is an apocalyptic number.

It is an amenable number.

720320 is an abundant number, since it is smaller than the sum of its proper divisors (995704).

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

720320 is a wasteful number, since it uses less digits than its factorization.

720320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268 (or 2258 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 720320 is about 848.7166782855. The cubic root of 720320 is about 89.6413712008.

Adding to 720320 its reverse (23027), we get a palindrome (743347).

It can be divided in two parts, 720 and 320, that multiplied together give a square (230400 = 480²).

The spelling of 720320 in words is "seven hundred twenty thousand, three hundred twenty", and thus it is an iban number.