30120220 has 96 divisors (see below), whose sum is σ = 72930816. Its totient is φ = 10368000.

The previous prime is 30120217. The next prime is 30120221. The reversal of 30120220 is 2202103.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 30120197 and 30120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298170 + ... + 298270.

It is an arithmetic number, because the mean of its divisors is an integer number (759696).

Almost surely, 2^30120220 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 30120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36465408).

30120220 is an abundant number, since it is smaller than the sum of its proper divisors (42810596).

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

30120220 is a wasteful number, since it uses less digits than its factorization.

30120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 30120220 is about 5488.1891366825. The cubic root of 30120220 is about 311.1377546154.

Adding to 30120220 its reverse (2202103), we get a palindrome (32322323).

The spelling of 30120220 in words is "thirty million, one hundred twenty thousand, two hundred twenty".