3856985 has 16 divisors (see below), whose sum is σ = 5270400. Its totient is φ = 2682240.

The previous prime is 3856973. The next prime is 3856987. The reversal of 3856985 is 5896583.

It is not a de Polignac number, because 3856985 - 2⁶ = 3856921 is a prime.

It is a super-3 number, since 3×3856985³ (a number of 21 digits) contains 333 as substring.

It is an alternating number because its digits alternate between odd and even.

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 15 ways as a sum of consecutive naturals, for example, 260 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (329400).

Almost surely, 2^3856985 is an apocalyptic number.

It is an amenable number.

3856985 is a deficient number, since it is larger than the sum of its proper divisors (1413415).

3856985 is a wasteful number, since it uses less digits than its factorization.

3856985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088.

The product of its digits is 259200, while the sum is 44.

The square root of 3856985 is about 1963.9208232513. The cubic root of 3856985 is about 156.8252481079.

The spelling of 3856985 in words is "three million, eight hundred fifty-six thousand, nine hundred eighty-five".