3856664 has 32 divisors (see below), whose sum is σ = 8407200. Its totient is φ = 1624320.

The previous prime is 3856661. The next prime is 3856667. The reversal of 3856664 is 4666583.

3856664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3856661) and next prime (3856667).

It is a d-powerful number, because it can be written as 3⁵ + 8⁷ + 5⁷ + 6³ + 6⁴ + 6⁸ + 4² .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2852 + ... + 3980.

It is an arithmetic number, because the mean of its divisors is an integer number (262725).

Almost surely, 2^3856664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3856664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4203600).

3856664 is an abundant number, since it is smaller than the sum of its proper divisors (4550536).

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

3856664 is a wasteful number, since it uses less digits than its factorization.

3856664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1199 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 3856664 is about 1963.8390972786. The cubic root of 3856664 is about 156.8208973606.

The spelling of 3856664 in words is "three million, eight hundred fifty-six thousand, six hundred sixty-four".