12638238 has 16 divisors (see below), whose sum is σ = 25960080. Its totient is φ = 4098816.

The previous prime is 12638237. The next prime is 12638239. The reversal of 12638238 is 83283621.

It is an interprime number because it is at equal distance from previous prime (12638237) and next prime (12638239).

It is a junction number, because it is equal to n+sod(n) for n = 12638199 and 12638208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12638233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28243 + ... + 28686.

It is an arithmetic number, because the mean of its divisors is an integer number (1622505).

Almost surely, 2^12638238 is an apocalyptic number.

12638238 is an abundant number, since it is smaller than the sum of its proper divisors (13321842).

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

12638238 is a wasteful number, since it uses less digits than its factorization.

12638238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56971.

The product of its digits is 13824, while the sum is 33.

The square root of 12638238 is about 3555.0299576797. The cubic root of 12638238 is about 232.9318324289.

The spelling of 12638238 in words is "twelve million, six hundred thirty-eight thousand, two hundred thirty-eight".