304222530 has 64 divisors (see below), whose sum is σ = 756569088. Its totient is φ = 78209280.

The previous prime is 304222517. The next prime is 304222537. The reversal of 304222530 is 35222403.

It is a junction number, because it is equal to n+sod(n) for n = 304222497 and 304222506.

It is not an unprimeable number, because it can be changed into a prime (304222537) 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, 346452 + ... + 347328.

It is an arithmetic number, because the mean of its divisors is an integer number (11821392).

Almost surely, 2^304222530 is an apocalyptic number.

304222530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 304222530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378284544).

304222530 is an abundant number, since it is smaller than the sum of its proper divisors (452346558).

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

304222530 is a wasteful number, since it uses less digits than its factorization.

304222530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 304222530 is about 17441.9760921749. The cubic root of 304222530 is about 672.5591072180.

Adding to 304222530 its reverse (35222403), we get a palindrome (339444933).

The spelling of 304222530 in words is "three hundred four million, two hundred twenty-two thousand, five hundred thirty".