12783456 has 144 divisors (see below), whose sum is σ = 44108064. Its totient is φ = 3428352.

The previous prime is 12783451. The next prime is 12783457. The reversal of 12783456 is 65438721.

12783456 is a `hidden beast` number, since 127 + 83 + 456 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 12783456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12783451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34086 + ... + 34458.

It is an arithmetic number, because the mean of its divisors is an integer number (306306).

Almost surely, 2^12783456 is an apocalyptic number.

12783456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12783456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22054032).

12783456 is an abundant number, since it is smaller than the sum of its proper divisors (31324608).

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

12783456 is a wasteful number, since it uses less digits than its factorization.

12783456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 402 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 12783456 is about 3575.3959221323. The cubic root of 12783456 is about 233.8205944612.

The spelling of 12783456 in words is "twelve million, seven hundred eighty-three thousand, four hundred fifty-six".