6861688 has 8 divisors (see below), whose sum is σ = 12865680. Its totient is φ = 3430840.

The previous prime is 6861629. The next prime is 6861691. The reversal of 6861688 is 8861686.

It is a happy number.

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

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428848 + ... + 428863.

It is an arithmetic number, because the mean of its divisors is an integer number (1608210).

Almost surely, 2^6861688 is an apocalyptic number.

It is an amenable number.

6861688 is a deficient number, since it is larger than the sum of its proper divisors (6003992).

6861688 is a wasteful number, since it uses less digits than its factorization.

6861688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857717 (or 857713 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 6861688 is about 2619.4823916186. The cubic root of 6861688 is about 190.0248167030.

The spelling of 6861688 in words is "six million, eight hundred sixty-one thousand, six hundred eighty-eight".