30868186 has 4 divisors (see below), whose sum is σ = 46302282. Its totient is φ = 15434092.

The previous prime is 30868183. The next prime is 30868193. The reversal of 30868186 is 68186803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17799961 + 13068225 = 4219^2 + 3615^2 .

It is not an unprimeable number, because it can be changed into a prime (30868183) 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 as a sum of consecutive naturals, namely, 7717045 + ... + 7717048.

Almost surely, 2^30868186 is an apocalyptic number.

30868186 is a deficient number, since it is larger than the sum of its proper divisors (15434096).

30868186 is a wasteful number, since it uses less digits than its factorization.

30868186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15434095.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 30868186 is about 5555.9145061817. The cubic root of 30868186 is about 313.6921875671.

The spelling of 30868186 in words is "thirty million, eight hundred sixty-eight thousand, one hundred eighty-six".