12011664 has 60 divisors (see below), whose sum is σ = 36103344. Its totient is φ = 3431232.

The previous prime is 12011651. The next prime is 12011669. The reversal of 12011664 is 46611021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12011664.

It is not an unprimeable number, because it can be changed into a prime (12011669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202 + ... + 4905.

Almost surely, 2^12011664 is an apocalyptic number.

12011664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18051672).

12011664 is an abundant number, since it is smaller than the sum of its proper divisors (24091680).

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

12011664 is a wasteful number, since it uses less digits than its factorization.

12011664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132 (or 5119 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 12011664 is about 3465.7847596179. The cubic root of 12011664 is about 229.0170019730.

Adding to 12011664 its reverse (46611021), we get a palindrome (58622685).

The spelling of 12011664 in words is "twelve million, eleven thousand, six hundred sixty-four".