309304 has 24 divisors (see below), whose sum is σ = 620280. Its totient is φ = 144320.

The previous prime is 309293. The next prime is 309311. The reversal of 309304 is 403903.

309304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7524 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (25845).

2³⁰⁹³⁰⁴ is an apocalyptic number.

It is an amenable number.

309304 is an abundant number, since it is smaller than the sum of its proper divisors (310976).

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

309304 is a wasteful number, since it uses less digits than its factorization.

309304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 309304 is about 556.1510586163. The cubic root of 309304 is about 67.6283064816.

The spelling of 309304 in words is "three hundred nine thousand, three hundred four".