304489 has 2 divisors, whose sum is σ = 304490. Its totient is φ = 304488.

The previous prime is 304481. The next prime is 304501. The reversal of 304489 is 984403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 110889 = 440^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 304489 - 2³ = 304481 is a prime.

It is a super-2 number, since 2×304489² = 185427102242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (304481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152244 + 152245.

It is an arithmetic number, because the mean of its divisors is an integer number (152245).

2³⁰⁴⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

304489 is a deficient number, since it is larger than the sum of its proper divisors (1).

304489 is an equidigital number, since it uses as much as digits as its factorization.

304489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 304489 is about 551.8052192577. The cubic root of 304489 is about 67.2755415849.

The spelling of 304489 in words is "three hundred four thousand, four hundred eighty-nine".