12784448 has 28 divisors (see below), whose sum is σ = 25854660. Its totient is φ = 6269952.

The previous prime is 12784433. The next prime is 12784451. The reversal of 12784448 is 84448721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9935104 + 2849344 = 3152^2 + 1688^2 .

It is a super-2 number, since 2×12784448² = 326884221329408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508 + ... + 5276.

Almost surely, 2^12784448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12784448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12927330).

12784448 is an abundant number, since it is smaller than the sum of its proper divisors (13070212).

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

12784448 is an equidigital number, since it uses as much as digits as its factorization.

12784448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834 (or 3824 counting only the distinct ones).

The product of its digits is 57344, while the sum is 38.

The square root of 12784448 is about 3575.5346453363. The cubic root of 12784448 is about 233.8266424874.

The spelling of 12784448 in words is "twelve million, seven hundred eighty-four thousand, four hundred forty-eight".