6388988 has 12 divisors (see below), whose sum is σ = 11198880. Its totient is φ = 3189312.

The previous prime is 6388981. The next prime is 6389017. The reversal of 6388988 is 8898836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6388981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245 + ... + 4827.

It is an arithmetic number, because the mean of its divisors is an integer number (933240).

Almost surely, 2^6388988 is an apocalyptic number.

It is an amenable number.

6388988 is a deficient number, since it is larger than the sum of its proper divisors (4809892).

6388988 is a wasteful number, since it uses less digits than its factorization.

6388988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596 (or 2594 counting only the distinct ones).

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

The square root of 6388988 is about 2527.6447535206. The cubic root of 6388988 is about 185.5570064282.

The spelling of 6388988 in words is "six million, three hundred eighty-eight thousand, nine hundred eighty-eight".