3870856 has 16 divisors (see below), whose sum is σ = 7917840. Its totient is φ = 1759440.

The previous prime is 3870847. The next prime is 3870863. The reversal of 3870856 is 6580783.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21906 + ... + 22081.

It is an arithmetic number, because the mean of its divisors is an integer number (494865).

Almost surely, 2^3870856 is an apocalyptic number.

It is an amenable number.

3870856 is an abundant number, since it is smaller than the sum of its proper divisors (4046984).

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

3870856 is a wasteful number, since it uses less digits than its factorization.

3870856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44004 (or 44000 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 3870856 is about 1967.4491098882. The cubic root of 3870856 is about 157.0130217606.

The spelling of 3870856 in words is "three million, eight hundred seventy thousand, eight hundred fifty-six".