8001986 has 4 divisors (see below), whose sum is σ = 12002982. Its totient is φ = 4000992.

The previous prime is 8001971. The next prime is 8001991. The reversal of 8001986 is 6891008.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7946761 + 55225 = 2819^2 + 235^2 .

It is a Curzon 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 as a sum of consecutive naturals, namely, 2000495 + ... + 2000498.

Almost surely, 2^8001986 is an apocalyptic number.

8001986 is a deficient number, since it is larger than the sum of its proper divisors (4000996).

8001986 is a wasteful number, since it uses less digits than its factorization.

8001986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000995.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 8001986 is about 2828.7781814769. The cubic root of 8001986 is about 200.0165486307.

The spelling of 8001986 in words is "eight million, one thousand, nine hundred eighty-six".