30186138 has 8 divisors (see below), whose sum is σ = 60372288. Its totient is φ = 10062044.

The previous prime is 30186131. The next prime is 30186139. The reversal of 30186138 is 83168103.

It is a sphenic number, since it is the product of 3 distinct primes.

30186138 is an admirable number.

It is a super-2 number, since 2×30186138² = 1822405854710088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30186131) 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 3 ways as a sum of consecutive naturals, for example, 2515506 + ... + 2515517.

It is an arithmetic number, because the mean of its divisors is an integer number (7546536).

Almost surely, 2^30186138 is an apocalyptic number.

30186138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30186138 is a wasteful number, since it uses less digits than its factorization.

30186138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5031028.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30186138 is about 5494.1912962692. The cubic root of 30186138 is about 311.3645638813.

The spelling of 30186138 in words is "thirty million, one hundred eighty-six thousand, one hundred thirty-eight".