30306220 has 48 divisors (see below), whose sum is σ = 75091968. Its totient is φ = 10054080.

The previous prime is 30306209. The next prime is 30306233. The reversal of 30306220 is 2260303.

It is a junction number, because it is equal to n+sod(n) for n = 30306194 and 30306203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849 + ... + 7831.

It is an arithmetic number, because the mean of its divisors is an integer number (1564416).

Almost surely, 2^30306220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30306220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37545984).

30306220 is an abundant number, since it is smaller than the sum of its proper divisors (44785748).

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

30306220 is a wasteful number, since it uses less digits than its factorization.

30306220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7030 (or 7028 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 30306220 is about 5505.1085366231. The cubic root of 30306220 is about 311.7768923262.

Adding to 30306220 its reverse (2260303), we get a palindrome (32566523).

The spelling of 30306220 in words is "thirty million, three hundred six thousand, two hundred twenty".