12440783 has 4 divisors (see below), whose sum is σ = 12557160. Its totient is φ = 12324408.

The previous prime is 12440741. The next prime is 12440809. The reversal of 12440783 is 38704421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12440783 - 2²⁰ = 11392207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440983) 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, 58028 + ... + 58241.

It is an arithmetic number, because the mean of its divisors is an integer number (3139290).

Almost surely, 2^12440783 is an apocalyptic number.

12440783 is a deficient number, since it is larger than the sum of its proper divisors (116377).

12440783 is a wasteful number, since it uses less digits than its factorization.

12440783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116376.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 12440783 is about 3527.1494156046. The cubic root of 12440783 is about 231.7123801468.

The spelling of 12440783 in words is "twelve million, four hundred forty thousand, seven hundred eighty-three".