304805 has 4 divisors (see below), whose sum is σ = 365772. Its totient is φ = 243840.

The previous prime is 304789. The next prime is 304807. The reversal of 304805 is 508403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 268324 = 191^2 + 518^2 .

It is not a de Polignac number, because 304805 - 2⁴ = 304789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304807) 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, 30476 + ... + 30485.

It is an arithmetic number, because the mean of its divisors is an integer number (91443).

2³⁰⁴⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

304805 is a deficient number, since it is larger than the sum of its proper divisors (60967).

304805 is an equidigital number, since it uses as much as digits as its factorization.

304805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60966.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 304805 is about 552.0914779273. The cubic root of 304805 is about 67.2988064879.

The spelling of 304805 in words is "three hundred four thousand, eight hundred five".