724385 has 8 divisors (see below), whose sum is σ = 907200. Its totient is φ = 554224.

The previous prime is 724331. The next prime is 724393. The reversal of 724385 is 583427.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 724385 - 2¹⁰ = 723361 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3035 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2⁷²⁴³⁸⁵ is an apocalyptic number.

It is an amenable number.

724385 is a deficient number, since it is larger than the sum of its proper divisors (182815).

724385 is a wasteful number, since it uses less digits than its factorization.

724385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327.

The product of its digits is 6720, while the sum is 29.

The square root of 724385 is about 851.1081012421. The cubic root of 724385 is about 89.8096801254.

The spelling of 724385 in words is "seven hundred twenty-four thousand, three hundred eighty-five".