12143343440 has 40 divisors (see below), whose sum is σ = 29894057640. Its totient is φ = 4571611136.

The previous prime is 12143343413. The next prime is 12143343461. The reversal of 12143343440 is 4434334121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 449948944 + 11693394496 = 21212^2 + 108136^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×12143343440³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4463105 + ... + 4465824.

It is an arithmetic number, because the mean of its divisors is an integer number (747351441).

Almost surely, 2^12143343440 is an apocalyptic number.

12143343440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143343440 is an abundant number, since it is smaller than the sum of its proper divisors (17750714200).

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

12143343440 is a wasteful number, since it uses less digits than its factorization.

12143343440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8928959 (or 8928953 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 12143343440 its reverse (4434334121), we get a palindrome (16577677561).

The spelling of 12143343440 in words is "twelve billion, one hundred forty-three million, three hundred forty-three thousand, four hundred forty".