6393888 has 54 divisors (see below), whose sum is σ = 18305469. Its totient is φ = 2116992.

The previous prime is 6393869. The next prime is 6393911. The reversal of 6393888 is 8883936.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

6393888 is a `hidden beast` number, since 639 + 3 + 8 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5253264 + 1140624 = 2292^2 + 1068^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1788.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 42838 + ... + 42986.

Almost surely, 2^6393888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6393888

6393888 is an abundant number, since it is smaller than the sum of its proper divisors (11911581).

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

6393888 is a wasteful number, since it uses less digits than its factorization.

6393888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 154 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 6393888 is about 2528.6138495231. The cubic root of 6393888 is about 185.6044316223.

The spelling of 6393888 in words is "six million, three hundred ninety-three thousand, eight hundred eighty-eight".