12440423124 has 96 divisors (see below), whose sum is σ = 33178924800. Its totient is φ = 4028123520.

The previous prime is 12440423077. The next prime is 12440423131. The reversal of 12440423124 is 42132404421.

12440423124 is a `hidden beast` number, since 1 + 2 + 4 + 404 + 231 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2830969 + ... + 2835359.

It is an arithmetic number, because the mean of its divisors is an integer number (345613800).

Almost surely, 2^12440423124 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 12440423124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16589462400).

12440423124 is an abundant number, since it is smaller than the sum of its proper divisors (20738501676).

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

12440423124 is a wasteful number, since it uses less digits than its factorization.

12440423124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5150 (or 5142 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 12440423124 its reverse (42132404421), we get a palindrome (54572827545).

The spelling of 12440423124 in words is "twelve billion, four hundred forty million, four hundred twenty-three thousand, one hundred twenty-four".