304221020 has 24 divisors (see below), whose sum is σ = 660895200. Its totient is φ = 117492032.

The previous prime is 304220953. The next prime is 304221031. The reversal of 304221020 is 20122403.

It is a junction number, because it is equal to n+sod(n) for n = 304220986 and 304221004.

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 7 ways as a sum of consecutive naturals, for example, 261680 + ... + 262839.

It is an arithmetic number, because the mean of its divisors is an integer number (27537300).

Almost surely, 2^304221020 is an apocalyptic number.

It is an amenable number.

304221020 is an abundant number, since it is smaller than the sum of its proper divisors (356674180).

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

304221020 is a wasteful number, since it uses less digits than its factorization.

304221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524557 (or 524555 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 304221020 is about 17441.9328057415. The cubic root of 304221020 is about 672.5579944734.

Adding to 304221020 its reverse (20122403), we get a palindrome (324343423).

The spelling of 304221020 in words is "three hundred four million, two hundred twenty-one thousand, twenty".