12440050040 has 64 divisors (see below), whose sum is σ = 30596400000. Its totient is φ = 4514509440.

The previous prime is 12440050031. The next prime is 12440050069. The reversal of 12440050040 is 4005004421.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12440049994 and 12440050021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191231 + ... + 247889.

It is an arithmetic number, because the mean of its divisors is an integer number (478068750).

Almost surely, 2^12440050040 is an apocalyptic number.

12440050040 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 12440050040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15298200000).

12440050040 is an abundant number, since it is smaller than the sum of its proper divisors (18156349960).

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

12440050040 is a wasteful number, since it uses less digits than its factorization.

12440050040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57180 (or 57176 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 12440050040 its reverse (4005004421), we get a palindrome (16445054461).

The spelling of 12440050040 in words is "twelve billion, four hundred forty million, fifty thousand, forty".