730530 has 24 divisors (see below), whose sum is σ = 1899612. Its totient is φ = 194784.

The previous prime is 730487. The next prime is 730537. The reversal of 730530 is 35037.

It can be written as a sum of positive squares in 2 ways, for example, as 710649 + 19881 = 843^2 + 141^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (730537) by changing a digit.

730530 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 11 ways as a sum of consecutive naturals, for example, 3969 + ... + 4148.

2⁷³⁰⁵³⁰ is an apocalyptic number.

730530 is an abundant number, since it is smaller than the sum of its proper divisors (1169082).

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

730530 is a wasteful number, since it uses less digits than its factorization.

730530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8130 (or 8127 counting only the distinct ones).

The product of its (nonzero) digits is 315, while the sum is 18.

The square root of 730530 is about 854.7104772963. The cubic root of 730530 is about 90.0629189661.

Adding to 730530 its reverse (35037), we get a palindrome (765567).

The spelling of 730530 in words is "seven hundred thirty thousand, five hundred thirty".