304381 has 16 divisors (see below), whose sum is σ = 391680. Its totient is φ = 229680.

The previous prime is 304373. The next prime is 304391. The reversal of 304381 is 183403.

It is not a de Polignac number, because 304381 - 2³ = 304373 is a prime.

It is a super-2 number, since 2×304381² = 185295586322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4510 + ... + 4576.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2³⁰⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

304381 is a deficient number, since it is larger than the sum of its proper divisors (87299).

304381 is a wasteful number, since it uses less digits than its factorization.

304381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 304381 is about 551.7073499601. The cubic root of 304381 is about 67.2675865984.

Adding to 304381 its reverse (183403), we get a palindrome (487784).

The spelling of 304381 in words is "three hundred four thousand, three hundred eighty-one".