730506 has 16 divisors (see below), whose sum is σ = 1669824. Its totient is φ = 208704.

The previous prime is 730487. The next prime is 730537. The reversal of 730506 is 605037.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

730506 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8655 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (104364).

2⁷³⁰⁵⁰⁶ is an apocalyptic number.

730506 is an abundant number, since it is smaller than the sum of its proper divisors (939318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

730506 is a wasteful number, since it uses less digits than its factorization.

730506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405.

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

The square root of 730506 is about 854.6964373390. The cubic root of 730506 is about 90.0619326805.

The spelling of 730506 in words is "seven hundred thirty thousand, five hundred six".