12688478 has 8 divisors (see below), whose sum is σ = 20763000. Its totient is φ = 5767480.

The previous prime is 12688471. The next prime is 12688513. The reversal of 12688478 is 87488621.

12688478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12688471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288353 + ... + 288396.

It is an arithmetic number, because the mean of its divisors is an integer number (2595375).

Almost surely, 2^12688478 is an apocalyptic number.

12688478 is a deficient number, since it is larger than the sum of its proper divisors (8074522).

12688478 is a wasteful number, since it uses less digits than its factorization.

12688478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576762.

The product of its digits is 172032, while the sum is 44.

The square root of 12688478 is about 3562.0889938349. The cubic root of 12688478 is about 233.2400774728.

The spelling of 12688478 in words is "twelve million, six hundred eighty-eight thousand, four hundred seventy-eight".