12636478 has 4 divisors (see below), whose sum is σ = 18954720. Its totient is φ = 6318238.

The previous prime is 12636473. The next prime is 12636497. The reversal of 12636478 is 87463621.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12636473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159118 + ... + 3159121.

It is an arithmetic number, because the mean of its divisors is an integer number (4738680).

Almost surely, 2^12636478 is an apocalyptic number.

12636478 is a deficient number, since it is larger than the sum of its proper divisors (6318242).

12636478 is an equidigital number, since it uses as much as digits as its factorization.

12636478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318241.

The product of its digits is 48384, while the sum is 37.

The square root of 12636478 is about 3554.7824124692. The cubic root of 12636478 is about 232.9210192375.

The spelling of 12636478 in words is "twelve million, six hundred thirty-six thousand, four hundred seventy-eight".