12440528 has 20 divisors (see below), whose sum is σ = 24161028. Its totient is φ = 6205440.

The previous prime is 12440521. The next prime is 12440537. The reversal of 12440528 is 82504421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5513104 + 6927424 = 2348^2 + 2632^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12440497 and 12440506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9650 + ... + 10862.

Almost surely, 2^12440528 is an apocalyptic number.

It is an amenable number.

12440528 is a deficient number, since it is larger than the sum of its proper divisors (11720500).

12440528 is a wasteful number, since it uses less digits than its factorization.

12440528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 1856 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 12440528 is about 3527.1132672484. The cubic root of 12440528 is about 231.7107969919.

Adding to 12440528 its reverse (82504421), we get a palindrome (94944949).

The spelling of 12440528 in words is "twelve million, four hundred forty thousand, five hundred twenty-eight".