3995986 has 8 divisors (see below), whose sum is σ = 6346620. Its totient is φ = 1880448.

The previous prime is 3995977. The next prime is 3995989. The reversal of 3995986 is 6895993.

It can be written as a sum of positive squares in 2 ways, for example, as 3876961 + 119025 = 1969^2 + 345^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×3995986² = 31935808224392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3995989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58731 + ... + 58798.

Almost surely, 2^3995986 is an apocalyptic number.

3995986 is a deficient number, since it is larger than the sum of its proper divisors (2350634).

3995986 is a wasteful number, since it uses less digits than its factorization.

3995986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117548.

The product of its digits is 524880, while the sum is 49.

The square root of 3995986 is about 1998.9962481205. The cubic root of 3995986 is about 158.6869888603.

The spelling of 3995986 in words is "three million, nine hundred ninety-five thousand, nine hundred eighty-six".