6638238 has 12 divisors (see below), whose sum is σ = 14382888. Its totient is φ = 2212740.

The previous prime is 6638231. The next prime is 6638249. The reversal of 6638238 is 8328366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184378 + ... + 184413.

It is an arithmetic number, because the mean of its divisors is an integer number (1198574).

Almost surely, 2^6638238 is an apocalyptic number.

6638238 is an abundant number, since it is smaller than the sum of its proper divisors (7744650).

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

6638238 is a wasteful number, since it uses less digits than its factorization.

6638238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368799 (or 368796 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 6638238 is about 2576.4778283540. The cubic root of 6638238 is about 187.9393006094.

The spelling of 6638238 in words is "six million, six hundred thirty-eight thousand, two hundred thirty-eight".