30261228 has 12 divisors (see below), whose sum is σ = 70609560. Its totient is φ = 10087072.

The previous prime is 30261221. The next prime is 30261229. The reversal of 30261228 is 82216203.

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 = 30261198 and 30261207.

It is not an unprimeable number, because it can be changed into a prime (30261221) 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, 1260873 + ... + 1260896.

It is an arithmetic number, because the mean of its divisors is an integer number (5884130).

Almost surely, 2^30261228 is an apocalyptic number.

It is an amenable number.

30261228 is an abundant number, since it is smaller than the sum of its proper divisors (40348332).

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

30261228 is a wasteful number, since it uses less digits than its factorization.

30261228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521776 (or 2521774 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 30261228 is about 5501.0206325736. The cubic root of 30261228 is about 311.6225300281.

The spelling of 30261228 in words is "thirty million, two hundred sixty-one thousand, two hundred twenty-eight".