730605 has 16 divisors (see below), whose sum is σ = 1192320. Its totient is φ = 381888.

The previous prime is 730603. The next prime is 730619. The reversal of 730605 is 506037.

It is not a de Polignac number, because 730605 - 2¹ = 730603 is a prime.

It is a Curzon number.

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 730605.

It is not an unprimeable number, because it can be changed into a prime (730603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336 + ... + 1254.

It is an arithmetic number, because the mean of its divisors is an integer number (74520).

2⁷³⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

730605 is a deficient number, since it is larger than the sum of its proper divisors (461715).

730605 is a wasteful number, since it uses less digits than its factorization.

730605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 730605 is about 854.7543506763. The cubic root of 730605 is about 90.0660009695.

The spelling of 730605 in words is "seven hundred thirty thousand, six hundred five".