30420224 has 36 divisors (see below), whose sum is σ = 61074720. Its totient is φ = 15121920.

The previous prime is 30420209. The next prime is 30420227. The reversal of 30420224 is 42202403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84557 + ... + 84915.

It is an arithmetic number, because the mean of its divisors is an integer number (1696520).

Almost surely, 2^30420224 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 30420224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30537360).

30420224 is an abundant number, since it is smaller than the sum of its proper divisors (30654496).

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

30420224 is an equidigital number, since it uses as much as digits as its factorization.

30420224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 30420224 is about 5515.4531998740. The cubic root of 30420224 is about 312.1673439335.

Adding to 30420224 its reverse (42202403), we get a palindrome (72622627).

The spelling of 30420224 in words is "thirty million, four hundred twenty thousand, two hundred twenty-four".