30768228 has 48 divisors (see below), whose sum is σ = 80075520. Its totient is φ = 10216800.

The previous prime is 30768187. The next prime is 30768233. The reversal of 30768228 is 82286703.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30768192 and 30768201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46218 + ... + 46878.

It is an arithmetic number, because the mean of its divisors is an integer number (1668240).

Almost surely, 2^30768228 is an apocalyptic number.

It is an amenable number.

30768228 is an abundant number, since it is smaller than the sum of its proper divisors (49307292).

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

30768228 is a wasteful number, since it uses less digits than its factorization.

30768228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 30768228 is about 5546.9115731189. The cubic root of 30768228 is about 313.3532199038.

The spelling of 30768228 in words is "thirty million, seven hundred sixty-eight thousand, two hundred twenty-eight".