30420228 has 12 divisors (see below), whose sum is σ = 70980560. Its totient is φ = 10140072.

The previous prime is 30420227. The next prime is 30420239. The reversal of 30420228 is 82202403.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (30420227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267498 + ... + 1267521.

Almost surely, 2^30420228 is an apocalyptic number.

It is an amenable number.

30420228 is an abundant number, since it is smaller than the sum of its proper divisors (40560332).

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

30420228 is a wasteful number, since it uses less digits than its factorization.

30420228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2535026 (or 2535024 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 30420228 is about 5515.4535624915. The cubic root of 30420228 is about 312.1673576159.

The spelling of 30420228 in words is "thirty million, four hundred twenty thousand, two hundred twenty-eight".