304144020 has 144 divisors (see below), whose sum is σ = 980965440. Its totient is φ = 76059648.

The previous prime is 304143989. The next prime is 304144063. The reversal of 304144020 is 20441403.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 304143984 and 304144002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386067 + ... + 386853.

It is an arithmetic number, because the mean of its divisors is an integer number (6812260).

Almost surely, 2^304144020 is an apocalyptic number.

304144020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 304144020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490482720).

304144020 is an abundant number, since it is smaller than the sum of its proper divisors (676821420).

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

304144020 is a wasteful number, since it uses less digits than its factorization.

304144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 929 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 304144020 is about 17439.7253418739. The cubic root of 304144020 is about 672.5012469862.

Adding to 304144020 its reverse (20441403), we get a palindrome (324585423).

The spelling of 304144020 in words is "three hundred four million, one hundred forty-four thousand, twenty".