304320020 has 12 divisors (see below), whose sum is σ = 639072084. Its totient is φ = 121728000.

The previous prime is 304320013. The next prime is 304320101. The reversal of 304320020 is 20023403.

It can be written as a sum of positive squares in 2 ways, for example, as 146264836 + 158055184 = 12094^2 + 12572^2 .

It is a super-2 number, since 2×304320020² = 185221349145600800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304319977 and 304320004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7607981 + ... + 7608020.

It is an arithmetic number, because the mean of its divisors is an integer number (53256007).

Almost surely, 2^304320020 is an apocalyptic number.

It is an amenable number.

304320020 is an abundant number, since it is smaller than the sum of its proper divisors (334752064).

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

304320020 is a wasteful number, since it uses less digits than its factorization.

304320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15216010 (or 15216008 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 304320020 is about 17444.7705631229. The cubic root of 304320020 is about 672.6309414603.

Adding to 304320020 its reverse (20023403), we get a palindrome (324343423).

The spelling of 304320020 in words is "three hundred four million, three hundred twenty thousand, twenty".