12196638 has 24 divisors (see below), whose sum is σ = 26594568. Its totient is φ = 4039632.

The previous prime is 12196637. The next prime is 12196661. The reversal of 12196638 is 83669121.

12196638 is a `hidden beast` number, since 1 + 2 + 19 + 6 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12196637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856 + ... + 5012.

It is an arithmetic number, because the mean of its divisors is an integer number (1108107).

Almost surely, 2^12196638 is an apocalyptic number.

12196638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12196638 is an abundant number, since it is smaller than the sum of its proper divisors (14397930).

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

12196638 is a wasteful number, since it uses less digits than its factorization.

12196638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328 (or 4325 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12196638 is about 3492.3685372538. The cubic root of 12196638 is about 230.1866034475.

The spelling of 12196638 in words is "twelve million, one hundred ninety-six thousand, six hundred thirty-eight".