12638692 has 18 divisors (see below), whose sum is σ = 24312134. Its totient is φ = 5744640.

The previous prime is 12638683. The next prime is 12638699. The reversal of 12638692 is 29683621.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 1308736 = 3366^2 + 1144^2 .

It is not an unprimeable number, because it can be changed into a prime (12638699) 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 in 5 ways as a sum of consecutive naturals, for example, 12573 + ... + 13540.

Almost surely, 2^12638692 is an apocalyptic number.

It is an amenable number.

12638692 is a deficient number, since it is larger than the sum of its proper divisors (11673442).

12638692 is a wasteful number, since it uses less digits than its factorization.

12638692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139 (or 26126 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 12638692 is about 3555.0938102953. The cubic root of 12638692 is about 232.9346215778.

The spelling of 12638692 in words is "twelve million, six hundred thirty-eight thousand, six hundred ninety-two".