6638128 has 30 divisors (see below), whose sum is σ = 14962956. Its totient is φ = 2844576.

The previous prime is 6638101. The next prime is 6638131. The reversal of 6638128 is 8218366.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6638093 and 6638102.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3450 + ... + 5017.

Almost surely, 2^6638128 is an apocalyptic number.

It is an amenable number.

6638128 is an abundant number, since it is smaller than the sum of its proper divisors (8324828).

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

6638128 is a wasteful number, since it uses less digits than its factorization.

6638128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8489 (or 8476 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 6638128 is about 2576.4564812936. The cubic root of 6638128 is about 187.9382625107.

The spelling of 6638128 in words is "six million, six hundred thirty-eight thousand, one hundred twenty-eight".