30020188 has 12 divisors (see below), whose sum is σ = 57311352. Its totient is φ = 13645520.

The previous prime is 30020173. The next prime is 30020189. The reversal of 30020188 is 88102003.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020189) 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, 341095 + ... + 341182.

It is an arithmetic number, because the mean of its divisors is an integer number (4775946).

Almost surely, 2^30020188 is an apocalyptic number.

It is an amenable number.

30020188 is a deficient number, since it is larger than the sum of its proper divisors (27291164).

30020188 is a wasteful number, since it uses less digits than its factorization.

30020188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682292 (or 682290 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 30020188 is about 5479.0681689499. The cubic root of 30020188 is about 310.7929336446.

The spelling of 30020188 in words is "thirty million, twenty thousand, one hundred eighty-eight".