724436 has 12 divisors (see below), whose sum is σ = 1288980. Its totient is φ = 356160.

The previous prime is 724433. The next prime is 724441. The reversal of 724436 is 634427.

It is a happy number.

724436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12100 + 712336 = 110^2 + 844^2 .

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 724436.

It is not an unprimeable number, because it can be changed into a prime (724433) 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, 1241 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (107415).

2⁷²⁴⁴³⁶ is an apocalyptic number.

It is an amenable number.

724436 is a deficient number, since it is larger than the sum of its proper divisors (564544).

724436 is a wasteful number, since it uses less digits than its factorization.

724436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034 (or 3032 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 724436 is about 851.1380616563. The cubic root of 724436 is about 89.8117877460.

Subtracting from 724436 its reverse (634427), we obtain a palindrome (90009).

The spelling of 724436 in words is "seven hundred twenty-four thousand, four hundred thirty-six".