12440038688 has 48 divisors (see below), whose sum is σ = 30534646464. Its totient is φ = 4846767360.

The previous prime is 12440038661. The next prime is 12440038733. The reversal of 12440038688 is 88683004421.

It is a super-2 number, since 2×12440038688² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2521895 + ... + 2526822.

It is an arithmetic number, because the mean of its divisors is an integer number (636138468).

Almost surely, 2^12440038688 is an apocalyptic number.

It is an amenable number.

12440038688 is an abundant number, since it is smaller than the sum of its proper divisors (18094607776).

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

12440038688 is a wasteful number, since it uses less digits than its factorization.

12440038688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048745 (or 5048737 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 12440038688 in words is "twelve billion, four hundred forty million, thirty-eight thousand, six hundred eighty-eight".