3867986 has 4 divisors (see below), whose sum is σ = 5801982. Its totient is φ = 1933992.

The previous prime is 3867961. The next prime is 3868003. The reversal of 3867986 is 6897683.

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., 3258025 + 609961 = 1805^2 + 781^2 .

It is a super-2 number, since 2×3867986² = 29922631392392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3867986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 966995 + ... + 966998.

Almost surely, 2^3867986 is an apocalyptic number.

3867986 is a deficient number, since it is larger than the sum of its proper divisors (1933996).

3867986 is a wasteful number, since it uses less digits than its factorization.

3867986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933995.

The product of its digits is 435456, while the sum is 47.

The square root of 3867986 is about 1966.7196038073. The cubic root of 3867986 is about 156.9742070222.

The spelling of 3867986 in words is "three million, eight hundred sixty-seven thousand, nine hundred eighty-six".