304840 has 16 divisors (see below), whose sum is σ = 685980. Its totient is φ = 121920.

The previous prime is 304831. The next prime is 304847. The reversal of 304840 is 48403.

It can be written as a sum of positive squares in 2 ways, for example, as 298116 + 6724 = 546^2 + 82^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (304847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3771 + ... + 3850.

2³⁰⁴⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

304840 is an abundant number, since it is smaller than the sum of its proper divisors (381140).

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

304840 is a wasteful number, since it uses less digits than its factorization.

304840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632 (or 7628 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 304840 is about 552.1231746630. The cubic root of 304840 is about 67.3013823075.

The spelling of 304840 in words is "three hundred four thousand, eight hundred forty".