12639648 has 72 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 3609984.

The previous prime is 12639637. The next prime is 12639659. The reversal of 12639648 is 84693621.

It is an interprime number because it is at equal distance from previous prime (12639637) and next prime (12639659).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3361 + ... + 6047.

It is an arithmetic number, because the mean of its divisors is an integer number (536256).

Almost surely, 2^12639648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12639648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19305216).

12639648 is an abundant number, since it is smaller than the sum of its proper divisors (25970784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12639648 is a wasteful number, since it uses less digits than its factorization.

12639648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2699 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 12639648 is about 3555.2282627139. The cubic root of 12639648 is about 232.9404945454.

The spelling of 12639648 in words is "twelve million, six hundred thirty-nine thousand, six hundred forty-eight".