12813784 has 16 divisors (see below), whose sum is σ = 25439400. Its totient is φ = 6029952.

The previous prime is 12813761. The next prime is 12813791. The reversal of 12813784 is 48731821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 46974 + ... + 47245.

Almost surely, 2^12813784 is an apocalyptic number.

It is an amenable number.

12813784 is a deficient number, since it is larger than the sum of its proper divisors (12625616).

12813784 is a wasteful number, since it uses less digits than its factorization.

12813784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94242 (or 94238 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 12813784 is about 3579.6346182257. The cubic root of 12813784 is about 234.0053569767.

The spelling of 12813784 in words is "twelve million, eight hundred thirteen thousand, seven hundred eighty-four".