12631638 has 8 divisors (see below), whose sum is σ = 25263288. Its totient is φ = 4210544.

The previous prime is 12631621. The next prime is 12631639. The reversal of 12631638 is 83613621.

12631638 is digitally balanced in base 2 and base 4, because in such bases 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.

12631638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12631639) 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, 1052631 + ... + 1052642.

It is an arithmetic number, because the mean of its divisors is an integer number (3157911).

Almost surely, 2^12631638 is an apocalyptic number.

12631638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12631638 is a wasteful number, since it uses less digits than its factorization.

12631638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105278.

The product of its digits is 5184, while the sum is 30.

The square root of 12631638 is about 3554.1015742379. The cubic root of 12631638 is about 232.8912777834.

The spelling of 12631638 in words is "twelve million, six hundred thirty-one thousand, six hundred thirty-eight".