3856986 has 36 divisors (see below), whose sum is σ = 9723402. Its totient is φ = 1101744.

The previous prime is 3856973. The next prime is 3856987. The reversal of 3856986 is 6896583.

3856986 is a `hidden beast` number, since 3 + 8 + 569 + 86 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3186225 + 670761 = 1785^2 + 819^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3856987) 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 17 ways as a sum of consecutive naturals, for example, 1305 + ... + 3068.

Almost surely, 2^3856986 is an apocalyptic number.

3856986 is an abundant number, since it is smaller than the sum of its proper divisors (5866416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3856986 is a wasteful number, since it uses less digits than its factorization.

3856986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395 (or 4385 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3856986 is about 1963.9210778440. The cubic root of 3856986 is about 156.8252616612.

The spelling of 3856986 in words is "three million, eight hundred fifty-six thousand, nine hundred eighty-six".