12188268 has 18 divisors (see below), whose sum is σ = 30809324. Its totient is φ = 4062744.

The previous prime is 12188257. The next prime is 12188273. The reversal of 12188268 is 86288121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 338563 = 12188268 / (1 + 2 + 1 + 8 + 8 + 2 + 6 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169246 + ... + 169317.

Almost surely, 2^12188268 is an apocalyptic number.

12188268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12188268 is an abundant number, since it is smaller than the sum of its proper divisors (18621056).

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

12188268 is a wasteful number, since it uses less digits than its factorization.

12188268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338573 (or 338568 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 12188268 is about 3491.1700044541. The cubic root of 12188268 is about 230.1339358527.

The spelling of 12188268 in words is "twelve million, one hundred eighty-eight thousand, two hundred sixty-eight".