12440072 has 36 divisors (see below), whose sum is σ = 24732045. Its totient is φ = 5865888.

The previous prime is 12440059. The next prime is 12440089. The reversal of 12440072 is 27004421.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 12432676 + 7396 = 3526^2 + 86^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2494.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 289283 + ... + 289325.

Almost surely, 2^12440072 is an apocalyptic number.

It is an amenable number.

12440072 is a deficient number, since it is larger than the sum of its proper divisors (12291973).

12440072 is an equidigital number, since it uses as much as digits as its factorization.

12440072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12440072 is about 3527.0486245585. The cubic root of 12440072 is about 231.7079658845.

Adding to 12440072 its reverse (27004421), we get a palindrome (39444493).

The spelling of 12440072 in words is "twelve million, four hundred forty thousand, seventy-two".