12012440 has 64 divisors (see below), whose sum is σ = 30792960. Its totient is φ = 4174720.

The previous prime is 12012439. The next prime is 12012443. The reversal of 12012440 is 4421021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9527 + ... + 10713.

It is an arithmetic number, because the mean of its divisors is an integer number (481140).

Almost surely, 2^12012440 is an apocalyptic number.

12012440 is a gapful number since it is divisible by the number (10) 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 12012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15396480).

12012440 is an abundant number, since it is smaller than the sum of its proper divisors (18780520).

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

12012440 is a wasteful number, since it uses less digits than its factorization.

12012440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 12012440 is about 3465.8967093669. The cubic root of 12012440 is about 229.0219336619.

Adding to 12012440 its reverse (4421021), we get a palindrome (16433461).

The spelling of 12012440 in words is "twelve million, twelve thousand, four hundred forty".