304213500 has 144 divisors (see below), whose sum is σ = 974981280. Its totient is φ = 79833600.

The previous prime is 304213493. The next prime is 304213501. The reversal of 304213500 is 5312403.

304213500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304213501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300996 + ... + 302004.

Almost surely, 2^304213500 is an apocalyptic number.

304213500 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 304213500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487490640).

304213500 is an abundant number, since it is smaller than the sum of its proper divisors (670767780).

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

304213500 is a wasteful number, since it uses less digits than its factorization.

304213500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 304213500 is about 17441.7172319700. The cubic root of 304213500 is about 672.5524528031.

Adding to 304213500 its reverse (5312403), we get a palindrome (309525903).

The spelling of 304213500 in words is "three hundred four million, two hundred thirteen thousand, five hundred".