305530 has 8 divisors (see below), whose sum is σ = 549972. Its totient is φ = 122208.

The previous prime is 305521. The next prime is 305533. The reversal of 305530 is 35503.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 17161 = 537^2 + 131^2 .

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

It is not an unprimeable number, because it can be changed into a prime (305533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15267 + ... + 15286.

2³⁰⁵⁵³⁰ is an apocalyptic number.

305530 is a deficient number, since it is larger than the sum of its proper divisors (244442).

305530 is a wasteful number, since it uses less digits than its factorization.

305530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30560.

The product of its (nonzero) digits is 225, while the sum is 16.

The square root of 305530 is about 552.7476820395. The cubic root of 305530 is about 67.3521225435.

The spelling of 305530 in words is "three hundred five thousand, five hundred thirty".