3927986 has 16 divisors (see below), whose sum is σ = 6511104. Its totient is φ = 1767744.

The previous prime is 3927971. The next prime is 3927997. The reversal of 3927986 is 6897293.

It is a d-powerful number, because it can be written as 3¹⁰ + 9 + 2²¹ + 7³ + 9⁵ + 8⁵ + 6⁸ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1730 + ... + 3293.

It is an arithmetic number, because the mean of its divisors is an integer number (406944).

Almost surely, 2^3927986 is an apocalyptic number.

3927986 is a deficient number, since it is larger than the sum of its proper divisors (2583118).

3927986 is a wasteful number, since it uses less digits than its factorization.

3927986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065.

The product of its digits is 163296, while the sum is 44.

The square root of 3927986 is about 1981.9147307591. The cubic root of 3927986 is about 157.7817046272.

It can be divided in two parts, 3927 and 986, that added together give a cube (4913 = 17³).

The spelling of 3927986 in words is "three million, nine hundred twenty-seven thousand, nine hundred eighty-six".