304985 has 8 divisors (see below), whose sum is σ = 369096. Its totient is φ = 241920.

The previous prime is 304981. The next prime is 305017. The reversal of 304985 is 589403.

It can be written as a sum of positive squares in 4 ways, for example, as 5776 + 299209 = 76^2 + 547^2 .

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

It is not a de Polignac number, because 304985 - 2² = 304981 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 (304981) 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, 737 + ... + 1073.

It is an arithmetic number, because the mean of its divisors is an integer number (46137).

2³⁰⁴⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

304985 is a deficient number, since it is larger than the sum of its proper divisors (64111).

304985 is a wasteful number, since it uses less digits than its factorization.

304985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 304985 is about 552.2544703305. The cubic root of 304985 is about 67.3120514602.

It can be divided in two parts, 30498 and 5, that added together give a palindrome (30503).

The spelling of 304985 in words is "three hundred four thousand, nine hundred eighty-five".