30055220 has 24 divisors (see below), whose sum is σ = 67971624. Its totient is φ = 11097216.

The previous prime is 30055217. The next prime is 30055229. The reversal of 30055220 is 2255003.

It can be written as a sum of positive squares in 4 ways, for example, as 5513104 + 24542116 = 2348^2 + 4954^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30055229) 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, 57539 + ... + 58058.

It is an arithmetic number, because the mean of its divisors is an integer number (2832151).

Almost surely, 2^30055220 is an apocalyptic number.

It is an amenable number.

30055220 is an abundant number, since it is smaller than the sum of its proper divisors (37916404).

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

30055220 is a wasteful number, since it uses less digits than its factorization.

30055220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115619 (or 115617 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 30055220 is about 5482.2641308131. The cubic root of 30055220 is about 310.9137797196.

The spelling of 30055220 in words is "thirty million, fifty-five thousand, two hundred twenty".