12808784 has 10 divisors (see below), whose sum is σ = 24817050. Its totient is φ = 6404384.

The previous prime is 12808777. The next prime is 12808801. The reversal of 12808784 is 48780821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 5626384 = 2680^2 + 2372^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400259 + ... + 400290.

It is an arithmetic number, because the mean of its divisors is an integer number (2481705).

Almost surely, 2^12808784 is an apocalyptic number.

It is an amenable number.

12808784 is a deficient number, since it is larger than the sum of its proper divisors (12008266).

12808784 is an equidigital number, since it uses as much as digits as its factorization.

12808784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800557 (or 800551 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 12808784 is about 3578.9361547812. The cubic root of 12808784 is about 233.9749163460.

The spelling of 12808784 in words is "twelve million, eight hundred eight thousand, seven hundred eighty-four".