8167986 has 48 divisors (see below), whose sum is σ = 19202400. Its totient is φ = 2573208.

The previous prime is 8167927. The next prime is 8167993. The reversal of 8167986 is 6897618.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19285 + ... + 19703.

It is an arithmetic number, because the mean of its divisors is an integer number (400050).

Almost surely, 2^8167986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8167986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9601200).

8167986 is an abundant number, since it is smaller than the sum of its proper divisors (11034414).

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

8167986 is a wasteful number, since it uses less digits than its factorization.

8167986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 443 counting only the distinct ones).

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

The square root of 8167986 is about 2857.9688591725. The cubic root of 8167986 is about 201.3901976955.

Adding to 8167986 its product of digits (145152), we get a palindrome (8313138).

The spelling of 8167986 in words is "eight million, one hundred sixty-seven thousand, nine hundred eighty-six".