724418 has 8 divisors (see below), whose sum is σ = 1091340. Its totient is φ = 360640.

The previous prime is 724403. The next prime is 724433. The reversal of 724418 is 814427.

It is an interprime number because it is at equal distance from previous prime (724403) and next prime (724433).

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 47089 = 823^2 + 217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 1206.

2⁷²⁴⁴¹⁸ is an apocalyptic number.

724418 is a deficient number, since it is larger than the sum of its proper divisors (366922).

724418 is a wasteful number, since it uses less digits than its factorization.

724418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 1792, while the sum is 26.

The square root of 724418 is about 851.1274875129. The cubic root of 724418 is about 89.8110438912.

Subtracting 724418 from its reverse (814427), we obtain a palindrome (90009).

It can be divided in two parts, 72 and 4418, that multiplied together give a square (318096 = 564²).

The spelling of 724418 in words is "seven hundred twenty-four thousand, four hundred eighteen".