306530 has 32 divisors (see below), whose sum is σ = 656640. Its totient is φ = 100800.

The previous prime is 306529. The next prime is 306533. The reversal of 306530 is 35603.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 306499 and 306508.

It is not an unprimeable number, because it can be changed into a prime (306533) 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, 1955 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2³⁰⁶⁵³⁰ is an apocalyptic number.

306530 is an abundant number, since it is smaller than the sum of its proper divisors (350110).

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

306530 is a wasteful number, since it uses less digits than its factorization.

306530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 306530 is about 553.6515149442. The cubic root of 306530 is about 67.4255237094.

The spelling of 306530 in words is "three hundred six thousand, five hundred thirty".