724306 has 24 divisors (see below), whose sum is σ = 1240092. Its totient is φ = 316800.

The previous prime is 724303. The next prime is 724309. The reversal of 724306 is 603427.

724306 is nontrivially palindromic in base 3.

It is an interprime number because it is at equal distance from previous prime (724303) and next prime (724309).

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 43681 = 825^2 + 209^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9886 + ... + 9958.

2⁷²⁴³⁰⁶ is an apocalyptic number.

724306 is a deficient number, since it is larger than the sum of its proper divisors (515786).

724306 is a wasteful number, since it uses less digits than its factorization.

724306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 724306 is about 851.0616898909. The cubic root of 724306 is about 89.8064151845.

724306 divided by its sum of digits (22) gives a palindrome (32923).

The spelling of 724306 in words is "seven hundred twenty-four thousand, three hundred six".