12440868 has 36 divisors (see below), whose sum is σ = 31771152. Its totient is φ = 3757680.

The previous prime is 12440867. The next prime is 12440873. The reversal of 12440868 is 86804421.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12440863) 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 11 ways as a sum of consecutive naturals, for example, 40371 + ... + 40677.

It is an arithmetic number, because the mean of its divisors is an integer number (882532).

Almost surely, 2^12440868 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 12440868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15885576).

12440868 is an abundant number, since it is smaller than the sum of its proper divisors (19330284).

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

12440868 is a wasteful number, since it uses less digits than its factorization.

12440868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 12440868 is about 3527.1614649743. The cubic root of 12440868 is about 231.7129078603.

Multiplying 12440868 by its sum of digits (33), we get a square (410548644 = 20262²).

12440868 divided by its sum of digits (33) gives a square (376996 = 614²).

The spelling of 12440868 in words is "twelve million, four hundred forty thousand, eight hundred sixty-eight".