304385 has 8 divisors (see below), whose sum is σ = 386856. Its totient is φ = 229120.

The previous prime is 304373. The next prime is 304391. The reversal of 304385 is 583403.

It can be written as a sum of positive squares in 4 ways, for example, as 124609 + 179776 = 353^2 + 424^2 .

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

It is not a de Polignac number, because 304385 - 2¹⁰ = 303361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 304385.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1706 + ... + 1875.

It is an arithmetic number, because the mean of its divisors is an integer number (48357).

2³⁰⁴³⁸⁵ is an apocalyptic number.

It is an amenable number.

304385 is a deficient number, since it is larger than the sum of its proper divisors (82471).

304385 is a wasteful number, since it uses less digits than its factorization.

304385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 304385 is about 551.7109750585. The cubic root of 304385 is about 67.2678812610.

Adding to 304385 its reverse (583403), we get a palindrome (887788).

The spelling of 304385 in words is "three hundred four thousand, three hundred eighty-five".