12156388 has 12 divisors (see below), whose sum is σ = 21298480. Its totient is φ = 6071112.

The previous prime is 12156383. The next prime is 12156439. The reversal of 12156388 is 88365121.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12156383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4795 + ... + 6877.

Almost surely, 2^12156388 is an apocalyptic number.

It is an amenable number.

12156388 is a deficient number, since it is larger than the sum of its proper divisors (9142092).

12156388 is a wasteful number, since it uses less digits than its factorization.

12156388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546 (or 3544 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 12156388 is about 3486.6012103480. The cubic root of 12156388 is about 229.9331122449.

It can be divided in two parts, 12156 and 388, that added together give a square (12544 = 112²).

The spelling of 12156388 in words is "twelve million, one hundred fifty-six thousand, three hundred eighty-eight".