6381688 has 8 divisors (see below), whose sum is σ = 11965680. Its totient is φ = 3190840.

The previous prime is 6381679. The next prime is 6381689. The reversal of 6381688 is 8861836.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6381688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398848 + ... + 398863.

It is an arithmetic number, because the mean of its divisors is an integer number (1495710).

Almost surely, 2^6381688 is an apocalyptic number.

It is an amenable number.

6381688 is a deficient number, since it is larger than the sum of its proper divisors (5583992).

6381688 is a wasteful number, since it uses less digits than its factorization.

6381688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797717 (or 797713 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 6381688 is about 2526.2003087641. The cubic root of 6381688 is about 185.4863075747.

The spelling of 6381688 in words is "six million, three hundred eighty-one thousand, six hundred eighty-eight".