724072 has 16 divisors (see below), whose sum is σ = 1404900. Its totient is φ = 349440.

The previous prime is 724021. The next prime is 724079. The reversal of 724072 is 270427.

It can be written as a sum of positive squares in 2 ways, for example, as 630436 + 93636 = 794^2 + 306^2 .

It is a super-2 number, since 2×724072² = 1048560522368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (724079) by changing a digit.

724072 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 in 3 ways as a sum of consecutive naturals, for example, 1329 + ... + 1792.

2⁷²⁴⁰⁷² is an apocalyptic number.

It is an amenable number.

724072 is a deficient number, since it is larger than the sum of its proper divisors (680828).

724072 is a wasteful number, since it uses less digits than its factorization.

724072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156 (or 3152 counting only the distinct ones).

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

The square root of 724072 is about 850.9242034400. The cubic root of 724072 is about 89.7967429536.

Adding to 724072 its reverse (270427), we get a palindrome (994499).

The spelling of 724072 in words is "seven hundred twenty-four thousand, seventy-two", and thus it is an iban number.