12638198 has 16 divisors (see below), whose sum is σ = 19420560. Its totient is φ = 6166656.

The previous prime is 12638189. The next prime is 12638207. The reversal of 12638198 is 89183621.

It is an interprime number because it is at equal distance from previous prime (12638189) and next prime (12638207).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15218 + ... + 16026.

It is an arithmetic number, because the mean of its divisors is an integer number (1213785).

Almost surely, 2^12638198 is an apocalyptic number.

12638198 is a deficient number, since it is larger than the sum of its proper divisors (6782362).

12638198 is a wasteful number, since it uses less digits than its factorization.

12638198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 20736, while the sum is 38.

The square root of 12638198 is about 3555.0243318436. The cubic root of 12638198 is about 232.9315866857.

The spelling of 12638198 in words is "twelve million, six hundred thirty-eight thousand, one hundred ninety-eight".