30321228 has 48 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 8556864.

The previous prime is 30321197. The next prime is 30321229. The reversal of 30321228 is 82212303.

It is a super-3 number, since 3×30321228³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (30321229) 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 15 ways as a sum of consecutive naturals, for example, 4798 + ... + 9146.

It is an arithmetic number, because the mean of its divisors is an integer number (1705200).

Almost surely, 2^30321228 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 30321228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40924800).

30321228 is an abundant number, since it is smaller than the sum of its proper divisors (51528372).

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

30321228 is a wasteful number, since it uses less digits than its factorization.

30321228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446 (or 4444 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 30321228 is about 5506.4714654668. The cubic root of 30321228 is about 311.8283490395.

The spelling of 30321228 in words is "thirty million, three hundred twenty-one thousand, two hundred twenty-eight".