12440423200 has 72 divisors (see below), whose sum is σ = 32156699652. Its totient is φ = 4683448320.

The previous prime is 12440423179. The next prime is 12440423201. The reversal of 12440423200 is 232404421.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2906072464 + 9534350736 = 53908^2 + 97644^2 .

It is a super-3 number, since 3×12440423200³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12440423201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443769 + ... + 470968.

Almost surely, 2^12440423200 is an apocalyptic number.

12440423200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12440423200 is an abundant number, since it is smaller than the sum of its proper divisors (19716276452).

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

12440423200 is a wasteful number, since it uses less digits than its factorization.

12440423200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914774 (or 914761 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 12440423200 its reverse (232404421), we get a palindrome (12672827621).

The spelling of 12440423200 in words is "twelve billion, four hundred forty million, four hundred twenty-three thousand, two hundred".