306304 has 16 divisors (see below), whose sum is σ = 610470. Its totient is φ = 153088.

The previous prime is 306301. The next prime is 306329. The reversal of 306304 is 403603.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 304704 + 1600 = 552^2 + 40^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (306301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069 + ... + 1324.

2³⁰⁶³⁰⁴ is an apocalyptic number.

It is an amenable number.

306304 is a deficient number, since it is larger than the sum of its proper divisors (304166).

306304 is an equidigital number, since it uses as much as digits as its factorization.

306304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 306304 is about 553.4473778057. The cubic root of 306304 is about 67.4089490241.

Adding to 306304 its reverse (403603), we get a palindrome (709907).

The spelling of 306304 in words is "three hundred six thousand, three hundred four".