6638442 has 8 divisors (see below), whose sum is σ = 13276896. Its totient is φ = 2212812.

The previous prime is 6638407. The next prime is 6638459. The reversal of 6638442 is 2448366.

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

6638442 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553198 + ... + 553209.

It is an arithmetic number, because the mean of its divisors is an integer number (1659612).

Almost surely, 2^6638442 is an apocalyptic number.

6638442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6638442 is a wasteful number, since it uses less digits than its factorization.

6638442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106412.

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

The square root of 6638442 is about 2576.5174169797. The cubic root of 6638442 is about 187.9412257801.

The spelling of 6638442 in words is "six million, six hundred thirty-eight thousand, four hundred forty-two".