304020 has 48 divisors (see below), whose sum is σ = 947520. Its totient is φ = 80928.

The previous prime is 304013. The next prime is 304021. The reversal of 304020 is 20403.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 303993 and 304011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (19740).

2³⁰⁴⁰²⁰ is an apocalyptic number.

304020 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 304020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473760).

304020 is an abundant number, since it is smaller than the sum of its proper divisors (643500).

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

304020 is a wasteful number, since it uses less digits than its factorization.

304020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 304020 is about 551.3800866916. The cubic root of 304020 is about 67.2409826543.

Adding to 304020 its reverse (20403), we get a palindrome (324423).

The spelling of 304020 in words is "three hundred four thousand, twenty", and thus it is an iban number.