6817986 has 64 divisors (see below), whose sum is σ = 18351360. Its totient is φ = 1831680.

The previous prime is 6817963. The next prime is 6817991. The reversal of 6817986 is 6897186.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5896 + ... + 6956.

It is an arithmetic number, because the mean of its divisors is an integer number (286740).

Almost surely, 2^6817986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6817986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9175680).

6817986 is an abundant number, since it is smaller than the sum of its proper divisors (11533374).

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

6817986 is a wasteful number, since it uses less digits than its factorization.

6817986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1090 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 6817986 is about 2611.1273427391. The cubic root of 6817986 is about 189.6205353499.

It can be divided in two parts, 68179 and 86, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 6817986 in words is "six million, eight hundred seventeen thousand, nine hundred eighty-six".