12018388 has 12 divisors (see below), whose sum is σ = 22269492. Its totient is φ = 5655680.

The previous prime is 12018353. The next prime is 12018401. The reversal of 12018388 is 88381021.

It can be written as a sum of positive squares in 2 ways, for example, as 4717584 + 7300804 = 2172^2 + 2702^2 .

It is a congruent number.

It is an unprimeable number.

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, 88303 + ... + 88438.

It is an arithmetic number, because the mean of its divisors is an integer number (1855791).

Almost surely, 2^12018388 is an apocalyptic number.

It is an amenable number.

12018388 is a deficient number, since it is larger than the sum of its proper divisors (10251104).

12018388 is a wasteful number, since it uses less digits than its factorization.

12018388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176762 (or 176760 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 12018388 is about 3466.7546783700. The cubic root of 12018388 is about 229.0597277511.

The spelling of 12018388 in words is "twelve million, eighteen thousand, three hundred eighty-eight".