30942188 has 24 divisors (see below), whose sum is σ = 56406000. Its totient is φ = 14833728.

The previous prime is 30942181. The next prime is 30942229. The reversal of 30942188 is 88124903.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30942181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17363 + ... + 19061.

It is an arithmetic number, because the mean of its divisors is an integer number (2350250).

Almost surely, 2^30942188 is an apocalyptic number.

It is an amenable number.

30942188 is a deficient number, since it is larger than the sum of its proper divisors (25463812).

30942188 is a wasteful number, since it uses less digits than its factorization.

30942188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 30942188 is about 5562.5702692191. The cubic root of 30942188 is about 313.9426646906.

The spelling of 30942188 in words is "thirty million, nine hundred forty-two thousand, one hundred eighty-eight".