30508220 has 24 divisors (see below), whose sum is σ = 64881600. Its totient is φ = 12048192.

The previous prime is 30508211. The next prime is 30508241. The reversal of 30508220 is 2280503.

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 = 30508192 and 30508201.

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, 8075 + ... + 11234.

It is an arithmetic number, because the mean of its divisors is an integer number (2703400).

Almost surely, 2^30508220 is an apocalyptic number.

It is an amenable number.

30508220 is an abundant number, since it is smaller than the sum of its proper divisors (34373380).

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

30508220 is a wasteful number, since it uses less digits than its factorization.

30508220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19397 (or 19395 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 30508220 is about 5523.4246622906. The cubic root of 30508220 is about 312.4680543344.

Adding to 30508220 its reverse (2280503), we get a palindrome (32788723).

The spelling of 30508220 in words is "thirty million, five hundred eight thousand, two hundred twenty".