724040 has 32 divisors (see below), whose sum is σ = 1702080. Its totient is φ = 276672.

The previous prime is 724021. The next prime is 724079. The reversal of 724040 is 40427.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (53190).

2⁷²⁴⁰⁴⁰ 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 724040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851040).

724040 is an abundant number, since it is smaller than the sum of its proper divisors (978040).

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

724040 is a wasteful number, since it uses less digits than its factorization.

724040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 724040 is about 850.9054001474. The cubic root of 724040 is about 89.7954200934.

Adding to 724040 its reverse (40427), we get a palindrome (764467).

The spelling of 724040 in words is "seven hundred twenty-four thousand, forty", and thus it is an iban number.