13440402012 has 24 divisors (see below), whose sum is σ = 31439156112. Its totient is φ = 4468960000.

The previous prime is 13440401993. The next prime is 13440402013. The reversal of 13440402012 is 21020404431.

It is a self number, because there is not a number n which added to its sum of digits gives 13440402012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440402013) 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 7 ways as a sum of consecutive naturals, for example, 1391739 + ... + 1401362.

It is an arithmetic number, because the mean of its divisors is an integer number (1309964838).

Almost surely, 2^13440402012 is an apocalyptic number.

13440402012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13440402012 is an abundant number, since it is smaller than the sum of its proper divisors (17998754100).

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

13440402012 is a wasteful number, since it uses less digits than its factorization.

13440402012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793509 (or 2793507 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 13440402012 its reverse (21020404431), we get a palindrome (34460806443).

The spelling of 13440402012 in words is "thirteen billion, four hundred forty million, four hundred two thousand, twelve".