12018688 has 66 divisors (see below), whose sum is σ = 26680598. Its totient is φ = 5406720.

The previous prime is 12018683. The next prime is 12018703. The reversal of 12018688 is 88681021.

It can be written as a sum of positive squares in only one way, i.e., 10036224 + 1982464 = 3168^2 + 1408^2 .

It is a super-2 number, since 2×12018688² = 288897722482688, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12018683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123856 + ... + 123952.

Almost surely, 2^12018688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12018688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13340299).

12018688 is an abundant number, since it is smaller than the sum of its proper divisors (14661910).

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

12018688 is an equidigital number, since it uses as much as digits as its factorization.

12018688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 12018688 is about 3466.7979462322. The cubic root of 12018688 is about 229.0616336458.

It can be divided in two parts, 1201 and 8688, that added together give a palindrome (9889).

The spelling of 12018688 in words is "twelve million, eighteen thousand, six hundred eighty-eight".