3881656 has 8 divisors (see below), whose sum is σ = 7278120. Its totient is φ = 1940824.

The previous prime is 3881611. The next prime is 3881659. The reversal of 3881656 is 6561883.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242596 + ... + 242611.

It is an arithmetic number, because the mean of its divisors is an integer number (909765).

Almost surely, 2^3881656 is an apocalyptic number.

It is an amenable number.

3881656 is a deficient number, since it is larger than the sum of its proper divisors (3396464).

3881656 is a wasteful number, since it uses less digits than its factorization.

3881656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485213 (or 485209 counting only the distinct ones).

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

The square root of 3881656 is about 1970.1918688290. The cubic root of 3881656 is about 157.1589124879.

The spelling of 3881656 in words is "three million, eight hundred eighty-one thousand, six hundred fifty-six".