304821306 has 40 divisors (see below), whose sum is σ = 699699924. Its totient is φ = 99126720.

The previous prime is 304821299. The next prime is 304821311. The reversal of 304821306 is 603128403.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 248346081 + 56475225 = 15759^2 + 7515^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 304821306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16305 + ... + 29588.

Almost surely, 2^304821306 is an apocalyptic number.

304821306 is an abundant number, since it is smaller than the sum of its proper divisors (394878618).

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

304821306 is a wasteful number, since it uses less digits than its factorization.

304821306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45948 (or 45939 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 304821306 is about 17459.1324526736. The cubic root of 304821306 is about 673.0000654996. Note that the first 4 decimals are identical.

Adding to 304821306 its reverse (603128403), we get a palindrome (907949709).

The spelling of 304821306 in words is "three hundred four million, eight hundred twenty-one thousand, three hundred six".