305314220 has 24 divisors (see below), whose sum is σ = 678875904. Its totient is φ = 114941696.

The previous prime is 305314187. The next prime is 305314231. The reversal of 305314220 is 22413503.

It is a happy number.

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 = 305314192 and 305314201.

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, 448652 + ... + 449331.

It is an arithmetic number, because the mean of its divisors is an integer number (28286496).

Almost surely, 2^305314220 is an apocalyptic number.

It is an amenable number.

305314220 is an abundant number, since it is smaller than the sum of its proper divisors (373561684).

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

305314220 is a wasteful number, since it uses less digits than its factorization.

305314220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898009 (or 898007 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 305314220 is about 17473.2429731862. The cubic root of 305314220 is about 673.3626303845.

Adding to 305314220 its reverse (22413503), we get a palindrome (327727723).

The spelling of 305314220 in words is "three hundred five million, three hundred fourteen thousand, two hundred twenty".