304144220 has 24 divisors (see below), whose sum is σ = 641453904. Its totient is φ = 121133696.

The previous prime is 304144189. The next prime is 304144223. The reversal of 304144220 is 22441403.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 304144192 and 304144201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304144223) 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, 27974 + ... + 37293.

It is an arithmetic number, because the mean of its divisors is an integer number (26727246).

Almost surely, 2^304144220 is an apocalyptic number.

It is an amenable number.

304144220 is an abundant number, since it is smaller than the sum of its proper divisors (337309684).

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

304144220 is a wasteful number, since it uses less digits than its factorization.

304144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65509 (or 65507 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 304144220 is about 17439.7310759083. The cubic root of 304144220 is about 672.5013943946.

Adding to 304144220 its reverse (22441403), we get a palindrome (326585623).

The spelling of 304144220 in words is "three hundred four million, one hundred forty-four thousand, two hundred twenty".