305223320 has 32 divisors (see below), whose sum is σ = 696431520. Its totient is φ = 120368640.

The previous prime is 305223227. The next prime is 305223349. The reversal of 305223320 is 23322503.

It is a super-2 number, since 2×305223320² = 186322550143644800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 305223292 and 305223301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50897 + ... + 56576.

It is an arithmetic number, because the mean of its divisors is an integer number (21763485).

Almost surely, 2^305223320 is an apocalyptic number.

It is an amenable number.

305223320 is an abundant number, since it is smaller than the sum of its proper divisors (391208200).

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

305223320 is a wasteful number, since it uses less digits than its factorization.

305223320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107555 (or 107551 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 305223320 is about 17470.6416596529. The cubic root of 305223320 is about 673.2957978836.

Adding to 305223320 its reverse (23322503), we get a palindrome (328545823).

The spelling of 305223320 in words is "three hundred five million, two hundred twenty-three thousand, three hundred twenty".