30220218 has 24 divisors (see below), whose sum is σ = 74831328. Its totient is φ = 8634312.

The previous prime is 30220207. The next prime is 30220219. The reversal of 30220218 is 81202203.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 30220218.

It is not an unprimeable number, because it can be changed into a prime (30220219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119796 + ... + 120047.

It is an arithmetic number, because the mean of its divisors is an integer number (3117972).

Almost surely, 2^30220218 is an apocalyptic number.

30220218 is an abundant number, since it is smaller than the sum of its proper divisors (44611110).

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

30220218 is a wasteful number, since it uses less digits than its factorization.

30220218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239858 (or 239855 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30220218 is about 5497.2918787345. The cubic root of 30220218 is about 311.4816961609.

The spelling of 30220218 in words is "thirty million, two hundred twenty thousand, two hundred eighteen".