30281228 has 12 divisors (see below), whose sum is σ = 53299680. Its totient is φ = 15052752.

The previous prime is 30281227. The next prime is 30281261. The reversal of 30281228 is 82218203.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 30281197 and 30281206.

It is not an unprimeable number, because it can be changed into a prime (30281227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21188 + ... + 22571.

It is an arithmetic number, because the mean of its divisors is an integer number (4441640).

Almost surely, 2^30281228 is an apocalyptic number.

It is an amenable number.

30281228 is a deficient number, since it is larger than the sum of its proper divisors (23018452).

30281228 is a wasteful number, since it uses less digits than its factorization.

30281228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43936 (or 43934 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 30281228 is about 5502.8381767957. The cubic root of 30281228 is about 311.6911665693.

The spelling of 30281228 in words is "thirty million, two hundred eighty-one thousand, two hundred twenty-eight".