3827986 has 4 divisors (see below), whose sum is σ = 5741982. Its totient is φ = 1913992.

The previous prime is 3827981. The next prime is 3828007. The reversal of 3827986 is 6897283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6897283 = 31 ⋅222493.

It can be written as a sum of positive squares in only one way, i.e., 3728761 + 99225 = 1931^2 + 315^2 .

It is not an unprimeable number, because it can be changed into a prime (3827981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956995 + ... + 956998.

Almost surely, 2^3827986 is an apocalyptic number.

3827986 is a deficient number, since it is larger than the sum of its proper divisors (1913996).

3827986 is a wasteful number, since it uses less digits than its factorization.

3827986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913995.

The product of its digits is 145152, while the sum is 43.

The square root of 3827986 is about 1956.5239584528. The cubic root of 3827986 is about 156.4312252462.

The spelling of 3827986 in words is "three million, eight hundred twenty-seven thousand, nine hundred eighty-six".