720304 has 20 divisors (see below), whose sum is σ = 1503376. Its totient is φ = 332352.

The previous prime is 720301. The next prime is 720311. The reversal of 720304 is 403027.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (720301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1524 + ... + 1939.

2⁷²⁰³⁰⁴ is an apocalyptic number.

It is an amenable number.

720304 is an abundant number, since it is smaller than the sum of its proper divisors (783072).

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

720304 is a wasteful number, since it uses less digits than its factorization.

720304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484 (or 3478 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 720304 is about 848.7072522372. The cubic root of 720304 is about 89.6407074807.

It can be divided in two parts, 720 and 304, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 720304 in words is "seven hundred twenty thousand, three hundred four", and thus it is an iban number.