3861856 has 48 divisors (see below), whose sum is σ = 8346240. Its totient is φ = 1751040.

The previous prime is 3861841. The next prime is 3861857. The reversal of 3861856 is 6581683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16750 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (173880).

Almost surely, 2^3861856 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 3861856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4173120).

3861856 is an abundant number, since it is smaller than the sum of its proper divisors (4484384).

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

3861856 is a wasteful number, since it uses less digits than its factorization.

3861856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 279 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 3861856 is about 1965.1605532373. The cubic root of 3861856 is about 156.8912387226.

The spelling of 3861856 in words is "three million, eight hundred sixty-one thousand, eight hundred fifty-six".