304387 has 4 divisors (see below), whose sum is σ = 308320. Its totient is φ = 300456.

The previous prime is 304373. The next prime is 304391. The reversal of 304387 is 783403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783403 = 23 ⋅34061.

It is a cyclic number.

It is not a de Polignac number, because 304387 - 2⁷ = 304259 is a prime.

It is a Duffinian number.

304387 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (304357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848 + ... + 2005.

It is an arithmetic number, because the mean of its divisors is an integer number (77080).

2³⁰⁴³⁸⁷ is an apocalyptic number.

304387 is a deficient number, since it is larger than the sum of its proper divisors (3933).

304387 is an equidigital number, since it uses as much as digits as its factorization.

304387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3932.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 304387 is about 551.7127875988. The cubic root of 304387 is about 67.2680285914.

The spelling of 304387 in words is "three hundred four thousand, three hundred eighty-seven".