30942228 has 12 divisors (see below), whose sum is σ = 72198560. Its totient is φ = 10314072.

The previous prime is 30942181. The next prime is 30942229. The reversal of 30942228 is 82224903.

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

It is a junction number, because it is equal to n+sod(n) for n = 30942195 and 30942204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30942229) 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, 1289248 + ... + 1289271.

Almost surely, 2^30942228 is an apocalyptic number.

It is an amenable number.

30942228 is an abundant number, since it is smaller than the sum of its proper divisors (41256332).

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

30942228 is a wasteful number, since it uses less digits than its factorization.

30942228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578526 (or 2578524 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 30942228 is about 5562.5738646781. The cubic root of 30942228 is about 313.9427999720.

The spelling of 30942228 in words is "thirty million, nine hundred forty-two thousand, two hundred twenty-eight".