30638228 has 24 divisors (see below), whose sum is σ = 54885600. Its totient is φ = 14960288.

The previous prime is 30638213. The next prime is 30638243. The reversal of 30638228 is 82283603.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30638213) and next prime (30638243).

It is a junction number, because it is equal to n+sod(n) for n = 30638194 and 30638203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46163 + ... + 46821.

It is an arithmetic number, because the mean of its divisors is an integer number (2286900).

Almost surely, 2^30638228 is an apocalyptic number.

It is an amenable number.

30638228 is a deficient number, since it is larger than the sum of its proper divisors (24247372).

30638228 is a wasteful number, since it uses less digits than its factorization.

30638228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 30638228 is about 5535.1809365187. The cubic root of 30638228 is about 312.9112767272.

The spelling of 30638228 in words is "thirty million, six hundred thirty-eight thousand, two hundred twenty-eight".