12444032440 has 32 divisors (see below), whose sum is σ = 31998941280. Its totient is φ = 4266525312.

The previous prime is 12444032329. The next prime is 12444032477. The reversal of 12444032440 is 4423044421.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 12444032399 and 12444032408.

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, 22221207 + ... + 22221766.

It is an arithmetic number, because the mean of its divisors is an integer number (999966915).

Almost surely, 2^12444032440 is an apocalyptic number.

12444032440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12444032440 is an abundant number, since it is smaller than the sum of its proper divisors (19554908840).

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

12444032440 is a wasteful number, since it uses less digits than its factorization.

12444032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44442991 (or 44442987 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 12444032440 its reverse (4423044421), we get a palindrome (16867076861).

The spelling of 12444032440 in words is "twelve billion, four hundred forty-four million, thirty-two thousand, four hundred forty".