304123020 has 96 divisors (see below), whose sum is σ = 917360640. Its totient is φ = 75060480.

The previous prime is 304122977. The next prime is 304123021. The reversal of 304123020 is 20321403.

It is a super-2 number, since 2×304123020² = 184981622587840800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (304123021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39226 + ... + 46334.

It is an arithmetic number, because the mean of its divisors is an integer number (9555840).

Almost surely, 2^304123020 is an apocalyptic number.

304123020 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 304123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458680320).

304123020 is an abundant number, since it is smaller than the sum of its proper divisors (613237620).

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

304123020 is a wasteful number, since it uses less digits than its factorization.

304123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175 (or 7173 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 304123020 is about 17439.1232577788. The cubic root of 304123020 is about 672.4857687365.

Adding to 304123020 its reverse (20321403), we get a palindrome (324444423).

The spelling of 304123020 in words is "three hundred four million, one hundred twenty-three thousand, twenty".