12344143440 has 80 divisors (see below), whose sum is σ = 40280904000. Its totient is φ = 3118519296.

The previous prime is 12344143439. The next prime is 12344143457. The reversal of 12344143440 is 4434144321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12344143398 and 12344143407.

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, 1348965 + ... + 1358084.

It is an arithmetic number, because the mean of its divisors is an integer number (503511300).

Almost surely, 2^12344143440 is an apocalyptic number.

12344143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12344143440 is an abundant number, since it is smaller than the sum of its proper divisors (27936760560).

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

12344143440 is a wasteful number, since it uses less digits than its factorization.

12344143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707084 (or 2707078 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 12344143440 its reverse (4434144321), we get a palindrome (16778287761).

The spelling of 12344143440 in words is "twelve billion, three hundred forty-four million, one hundred forty-three thousand, four hundred forty".