3881618 has 16 divisors (see below), whose sum is σ = 6543936. Its totient is φ = 1713360.

The previous prime is 3881611. The next prime is 3881659. The reversal of 3881618 is 8161883.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3881611) 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, 2648 + ... + 3843.

It is an arithmetic number, because the mean of its divisors is an integer number (408996).

Almost surely, 2^3881618 is an apocalyptic number.

3881618 is a deficient number, since it is larger than the sum of its proper divisors (2662318).

3881618 is a wasteful number, since it uses less digits than its factorization.

3881618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529.

The product of its digits is 9216, while the sum is 35.

The square root of 3881618 is about 1970.1822250746. The cubic root of 3881618 is about 157.1583996433.

The spelling of 3881618 in words is "three million, eight hundred eighty-one thousand, six hundred eighteen".