12878224 has 10 divisors (see below), whose sum is σ = 24951590. Its totient is φ = 6439104.

The previous prime is 12878213. The next prime is 12878227. The reversal of 12878224 is 42287821.

It can be written as a sum of positive squares in only one way, i.e., 7118224 + 5760000 = 2668^2 + 2400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12878224.

It is not an unprimeable number, because it can be changed into a prime (12878227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402429 + ... + 402460.

It is an arithmetic number, because the mean of its divisors is an integer number (2495159).

Almost surely, 2^12878224 is an apocalyptic number.

It is an amenable number.

12878224 is a deficient number, since it is larger than the sum of its proper divisors (12073366).

12878224 is an equidigital number, since it uses as much as digits as its factorization.

12878224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804897 (or 804891 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 12878224 is about 3588.6242489288. The cubic root of 12878224 is about 234.3969690577.

The spelling of 12878224 in words is "twelve million, eight hundred seventy-eight thousand, two hundred twenty-four".