12440784 has 20 divisors (see below), whose sum is σ = 32138816. Its totient is φ = 4146912.

The previous prime is 12440741. The next prime is 12440809. The reversal of 12440784 is 48704421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129544 + ... + 129639.

Almost surely, 2^12440784 is an apocalyptic number.

It is an amenable number.

12440784 is an abundant number, since it is smaller than the sum of its proper divisors (19698032).

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

12440784 is a wasteful number, since it uses less digits than its factorization.

12440784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259194 (or 259188 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 12440784 is about 3527.1495573621. The cubic root of 12440784 is about 231.7123863552.

The spelling of 12440784 in words is "twelve million, four hundred forty thousand, seven hundred eighty-four".