30881228 has 12 divisors (see below), whose sum is σ = 61762512. Its totient is φ = 13234800.

The previous prime is 30881173. The next prime is 30881261. The reversal of 30881228 is 82218803.

30881228 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 30881194 and 30881203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551423 + ... + 551478.

It is an arithmetic number, because the mean of its divisors is an integer number (5146876).

Almost surely, 2^30881228 is an apocalyptic number.

It is an amenable number.

30881228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30881228 is a wasteful number, since it uses less digits than its factorization.

30881228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102912 (or 1102910 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 30881228 is about 5557.0880863992. The cubic root of 30881228 is about 313.7363603114.

The spelling of 30881228 in words is "thirty million, eight hundred eighty-one thousand, two hundred twenty-eight".