304340 has 12 divisors (see below), whose sum is σ = 639156. Its totient is φ = 121728.

The previous prime is 304331. The next prime is 304349. The reversal of 304340 is 43403.

It is an interprime number because it is at equal distance from previous prime (304331) and next prime (304349).

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 114244 = 436^2 + 338^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304349) by changing a digit.

304340 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 3 ways as a sum of consecutive naturals, for example, 7589 + ... + 7628.

It is an arithmetic number, because the mean of its divisors is an integer number (53263).

2³⁰⁴³⁴⁰ is an apocalyptic number.

It is an amenable number.

304340 is an abundant number, since it is smaller than the sum of its proper divisors (334816).

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

304340 is a wasteful number, since it uses less digits than its factorization.

304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15226 (or 15224 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 304340 is about 551.6701913281. The cubic root of 304340 is about 67.2645661570.

Adding to 304340 its reverse (43403), we get a palindrome (347743).

The spelling of 304340 in words is "three hundred four thousand, three hundred forty", and thus it is an iban number.