30188061 has 12 divisors (see below), whose sum is σ = 43652700. Its totient is φ = 20103360.

The previous prime is 30188051. The next prime is 30188069. The reversal of 30188061 is 16088103.

It can be written as a sum of positive squares in 2 ways, for example, as 23328900 + 6859161 = 4830^2 + 2619^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30188061 is a prime.

It is a super-2 number, since 2×30188061² = 1822638053879442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30188069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14515 + ... + 16463.

It is an arithmetic number, because the mean of its divisors is an integer number (3637725).

Almost surely, 2^30188061 is an apocalyptic number.

It is an amenable number.

30188061 is a deficient number, since it is larger than the sum of its proper divisors (13464639).

30188061 is a wasteful number, since it uses less digits than its factorization.

30188061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 30188061 is about 5494.3662964895. The cubic root of 30188061 is about 311.3711755402.

The spelling of 30188061 in words is "thirty million, one hundred eighty-eight thousand, sixty-one".