724720 has 20 divisors (see below), whose sum is σ = 1685160. Its totient is φ = 289856.

The previous prime is 724651. The next prime is 724721. The reversal of 724720 is 27427.

724720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 724691 and 724700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724721) 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, 4450 + ... + 4609.

It is an arithmetic number, because the mean of its divisors is an integer number (84258).

2⁷²⁴⁷²⁰ is an apocalyptic number.

It is an amenable number.

724720 is an abundant number, since it is smaller than the sum of its proper divisors (960440).

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

724720 is a wasteful number, since it uses less digits than its factorization.

724720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9072 (or 9066 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 724720 is about 851.3048807566. The cubic root of 724720 is about 89.8235224910.

It can be divided in two parts, 724 and 720, that added together give a square (1444 = 38²).

The spelling of 724720 in words is "seven hundred twenty-four thousand, seven hundred twenty", and thus it is an iban number.