12440000 has 70 divisors (see below), whose sum is σ = 30946344. Its totient is φ = 4960000.

The previous prime is 12439979. The next prime is 12440009. The reversal of 12440000 is 4421.

12440000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39845 + ... + 40155.

Almost surely, 2^12440000 is an apocalyptic number.

12440000 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 12440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15473172).

12440000 is an abundant number, since it is smaller than the sum of its proper divisors (18506344).

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

12440000 is an frugal number, since it uses more digits than its factorization.

12440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 12440000 is about 3527.0384177097. The cubic root of 12440000 is about 231.7075188612.

Adding to 12440000 its reverse (4421), we get a palindrome (12444421).

The spelling of 12440000 in words is "twelve million, four hundred forty thousand".