6638642 has 8 divisors (see below), whose sum is σ = 10098432. Its totient is φ = 3272500.

The previous prime is 6638633. The next prime is 6638647. The reversal of 6638642 is 2468366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (6638647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23234 + ... + 23517.

It is an arithmetic number, because the mean of its divisors is an integer number (1262304).

Almost surely, 2^6638642 is an apocalyptic number.

6638642 is a deficient number, since it is larger than the sum of its proper divisors (3459790).

6638642 is a wasteful number, since it uses less digits than its factorization.

6638642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46824.

The product of its digits is 41472, while the sum is 35.

The square root of 6638642 is about 2576.5562287674. The cubic root of 6638642 is about 187.9431131641.

The spelling of 6638642 in words is "six million, six hundred thirty-eight thousand, six hundred forty-two".