6388340 has 24 divisors (see below), whose sum is σ = 15332352. Its totient is φ = 2190240.

The previous prime is 6388339. The next prime is 6388373. The reversal of 6388340 is 438836.

6388340 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

6388340 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 6388297 and 6388306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22676 + ... + 22955.

It is an arithmetic number, because the mean of its divisors is an integer number (638848).

Almost surely, 2^6388340 is an apocalyptic number.

It is an amenable number.

6388340 is an abundant number, since it is smaller than the sum of its proper divisors (8944012).

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

6388340 is a wasteful number, since it uses less digits than its factorization.

6388340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45647 (or 45645 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 6388340 is about 2527.5165677004. The cubic root of 6388340 is about 185.5507328731.

The spelling of 6388340 in words is "six million, three hundred eighty-eight thousand, three hundred forty".