12648478 has 4 divisors (see below), whose sum is σ = 18972720. Its totient is φ = 6324238.

The previous prime is 12648473. The next prime is 12648511. The reversal of 12648478 is 87484621.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12648478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12648473) 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, 3162118 + ... + 3162121.

It is an arithmetic number, because the mean of its divisors is an integer number (4743180).

Almost surely, 2^12648478 is an apocalyptic number.

12648478 is a deficient number, since it is larger than the sum of its proper divisors (6324242).

12648478 is an equidigital number, since it uses as much as digits as its factorization.

12648478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324241.

The product of its digits is 86016, while the sum is 40.

The square root of 12648478 is about 3556.4698789671. The cubic root of 12648478 is about 232.9947256384.

The spelling of 12648478 in words is "twelve million, six hundred forty-eight thousand, four hundred seventy-eight".