12638828 has 6 divisors (see below), whose sum is σ = 22117956. Its totient is φ = 6319412.

The previous prime is 12638827. The next prime is 12638839. The reversal of 12638828 is 82883621.

It is a junction number, because it is equal to n+sod(n) for n = 12638791 and 12638800.

It is not an unprimeable number, because it can be changed into a prime (12638827) 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, 1579850 + ... + 1579857.

It is an arithmetic number, because the mean of its divisors is an integer number (3686326).

Almost surely, 2^12638828 is an apocalyptic number.

It is an amenable number.

12638828 is a deficient number, since it is larger than the sum of its proper divisors (9479128).

12638828 is a wasteful number, since it uses less digits than its factorization.

12638828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159711 (or 3159709 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 12638828 is about 3555.1129377279. The cubic root of 12638828 is about 232.9354570808.

The spelling of 12638828 in words is "twelve million, six hundred thirty-eight thousand, eight hundred twenty-eight".