3671986 has 4 divisors (see below), whose sum is σ = 5507982. Its totient is φ = 1835992.

The previous prime is 3671971. The next prime is 3671989. The reversal of 3671986 is 6891763.

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., 3667225 + 4761 = 1915^2 + 69^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3671989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 917995 + ... + 917998.

Almost surely, 2^3671986 is an apocalyptic number.

3671986 is a deficient number, since it is larger than the sum of its proper divisors (1835996).

3671986 is a wasteful number, since it uses less digits than its factorization.

3671986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835995.

The product of its digits is 54432, while the sum is 40.

The square root of 3671986 is about 1916.2426777420. The cubic root of 3671986 is about 154.2766993720.

The spelling of 3671986 in words is "three million, six hundred seventy-one thousand, nine hundred eighty-six".