3969856 has 28 divisors (see below), whose sum is σ = 8595360. Its totient is φ = 1804160.

The previous prime is 3969853. The next prime is 3969863. The reversal of 3969856 is 6589693.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116 + ... + 3523.

Almost surely, 2^3969856 is an apocalyptic number.

It is an amenable number.

3969856 is an abundant number, since it is smaller than the sum of its proper divisors (4625504).

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

3969856 is a wasteful number, since it uses less digits than its factorization.

3969856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662 (or 5652 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 3969856 is about 1992.4497484253. The cubic root of 3969856 is about 158.3403441648.

The spelling of 3969856 in words is "three million, nine hundred sixty-nine thousand, eight hundred fifty-six".