30113220 has 48 divisors (see below), whose sum is σ = 85397760. Its totient is φ = 7927296.

The previous prime is 30113207. The next prime is 30113221. The reversal of 30113220 is 2231103.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30113196 and 30113205.

It is not an unprimeable number, because it can be changed into a prime (30113221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564 + ... + 7916.

It is an arithmetic number, because the mean of its divisors is an integer number (1779120).

Almost surely, 2^30113220 is an apocalyptic number.

30113220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30113220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42698880).

30113220 is an abundant number, since it is smaller than the sum of its proper divisors (55284540).

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

30113220 is a wasteful number, since it uses less digits than its factorization.

30113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444 (or 6442 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30113220 is about 5487.5513665022. The cubic root of 30113220 is about 311.1136497336.

Adding to 30113220 its reverse (2231103), we get a palindrome (32344323).

The spelling of 30113220 in words is "thirty million, one hundred thirteen thousand, two hundred twenty".