6388216 has 8 divisors (see below), whose sum is σ = 11977920. Its totient is φ = 3194104.

The previous prime is 6388211. The next prime is 6388219. The reversal of 6388216 is 6128836.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6388211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399256 + ... + 399271.

It is an arithmetic number, because the mean of its divisors is an integer number (1497240).

Almost surely, 2^6388216 is an apocalyptic number.

It is an amenable number.

6388216 is a deficient number, since it is larger than the sum of its proper divisors (5589704).

6388216 is a wasteful number, since it uses less digits than its factorization.

6388216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798533 (or 798529 counting only the distinct ones).

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

The square root of 6388216 is about 2527.4920375740. The cubic root of 6388216 is about 185.5495323296.

The spelling of 6388216 in words is "six million, three hundred eighty-eight thousand, two hundred sixteen".