6389888 has 16 divisors (see below), whose sum is σ = 12730110. Its totient is φ = 3194880.

The previous prime is 6389881. The next prime is 6389897. The reversal of 6389888 is 8889836.

It can be written as a sum of positive squares in only one way, i.e., 4293184 + 2096704 = 2072^2 + 1448^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (6389881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24833 + ... + 25088.

Almost surely, 2^6389888 is an apocalyptic number.

It is an amenable number.

6389888 is a deficient number, since it is larger than the sum of its proper divisors (6340222).

6389888 is an equidigital number, since it uses as much as digits as its factorization.

6389888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49935 (or 49923 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 6389888 is about 2527.8227785982. The cubic root of 6389888 is about 185.5657189956.

The spelling of 6389888 in words is "six million, three hundred eighty-nine thousand, eight hundred eighty-eight".