30123220 has 24 divisors (see below), whose sum is σ = 64731744. Its totient is φ = 11768736.

The previous prime is 30123211. The next prime is 30123229. The reversal of 30123220 is 2232103.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30123211) and next prime (30123229).

It is a self number, because there is not a number n which added to its sum of digits gives 30123220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123229) 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 7 ways as a sum of consecutive naturals, for example, 16654 + ... + 18373.

It is an arithmetic number, because the mean of its divisors is an integer number (2697156).

Almost surely, 2^30123220 is an apocalyptic number.

It is an amenable number.

30123220 is an abundant number, since it is smaller than the sum of its proper divisors (34608524).

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

30123220 is a wasteful number, since it uses less digits than its factorization.

30123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35079 (or 35077 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30123220 is about 5488.4624440730. The cubic root of 30123220 is about 311.1480841357.

Adding to 30123220 its reverse (2232103), we get a palindrome (32355323).

The spelling of 30123220 in words is "thirty million, one hundred twenty-three thousand, two hundred twenty".