30398188 has 12 divisors (see below), whose sum is σ = 53580520. Its totient is φ = 15089472.

The previous prime is 30398167. The next prime is 30398189. The reversal of 30398188 is 88189303.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30398188.

It is not an unprimeable number, because it can be changed into a prime (30398189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26781 + ... + 27892.

Almost surely, 2^30398188 is an apocalyptic number.

It is an amenable number.

30398188 is a deficient number, since it is larger than the sum of its proper divisors (23182332).

30398188 is a wasteful number, since it uses less digits than its factorization.

30398188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54816 (or 54814 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 30398188 is about 5513.4551780168. The cubic root of 30398188 is about 312.0919491209.

The spelling of 30398188 in words is "thirty million, three hundred ninety-eight thousand, one hundred eighty-eight".