3866856 has 32 divisors (see below), whose sum is σ = 11048640. Its totient is φ = 1104768.

The previous prime is 3866839. The next prime is 3866857. The reversal of 3866856 is 6586683.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (3866857) 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, 11341 + ... + 11676.

It is an arithmetic number, because the mean of its divisors is an integer number (345270).

Almost surely, 2^3866856 is an apocalyptic number.

It is an amenable number.

3866856 is an abundant number, since it is smaller than the sum of its proper divisors (7181784).

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

3866856 is a wasteful number, since it uses less digits than its factorization.

3866856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23033 (or 23029 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 3866856 is about 1966.4323024198. The cubic root of 3866856 is about 156.9589192962.

The spelling of 3866856 in words is "three million, eight hundred sixty-six thousand, eight hundred fifty-six".