6638244 has 24 divisors (see below), whose sum is σ = 15908928. Its totient is φ = 2152800.

The previous prime is 6638231. The next prime is 6638249. The reversal of 6638244 is 4428366.

It is not an unprimeable number, because it can be changed into a prime (6638249) 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, 7032 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (662872).

Almost surely, 2^6638244 is an apocalyptic number.

It is an amenable number.

6638244 is an abundant number, since it is smaller than the sum of its proper divisors (9270684).

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

6638244 is a wasteful number, since it uses less digits than its factorization.

6638244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14995 (or 14993 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 6638244 is about 2576.4789927341. The cubic root of 6638244 is about 187.9393572326.

The spelling of 6638244 in words is "six million, six hundred thirty-eight thousand, two hundred forty-four".