304681 has 8 divisors (see below), whose sum is σ = 342720. Its totient is φ = 268752.

The previous prime is 304663. The next prime is 304687. The reversal of 304681 is 186403.

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

It is a cyclic number.

It is not a de Polignac number, because 304681 - 2⁷ = 304553 is a prime.

It is a super-2 number, since 2×304681² = 185661023522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2³⁰⁴⁶⁸¹ is an apocalyptic number.

It is an amenable number.

304681 is a deficient number, since it is larger than the sum of its proper divisors (38039).

304681 is a wasteful number, since it uses less digits than its factorization.

304681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 304681 is about 551.9791662735. The cubic root of 304681 is about 67.2896791399.

The spelling of 304681 in words is "three hundred four thousand, six hundred eighty-one".