3942856 has 16 divisors (see below), whose sum is σ = 7470540. Its totient is φ = 1950720.

The previous prime is 3942839. The next prime is 3942871. The reversal of 3942856 is 6582493.

It can be written as a sum of positive squares in 2 ways, for example, as 3740356 + 202500 = 1934^2 + 450^2 .

It is a super-2 number, since 2×3942856² = 31092226873472, which contains 22 as substring.

3942856 is a Rhonda number in base 10.

Its product of digits (51840) is a multiple of the sum of its prime factors (5184).

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, 1765 + ... + 3316.

Almost surely, 2^3942856 is an apocalyptic number.

It is an amenable number.

3942856 is a deficient number, since it is larger than the sum of its proper divisors (3527684).

3942856 is a wasteful number, since it uses less digits than its factorization.

3942856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184 (or 5180 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 3942856 is about 1985.6626098106. The cubic root of 3942856 is about 157.9805562785.

The spelling of 3942856 in words is "three million, nine hundred forty-two thousand, eight hundred fifty-six".