3981616 has 10 divisors (see below), whose sum is σ = 7714412. Its totient is φ = 1990800.

The previous prime is 3981589. The next prime is 3981617. The reversal of 3981616 is 6161893.

It is not an unprimeable number, because it can be changed into a prime (3981617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124410 + ... + 124441.

Almost surely, 2^3981616 is an apocalyptic number.

It is an amenable number.

3981616 is a deficient number, since it is larger than the sum of its proper divisors (3732796).

3981616 is a wasteful number, since it uses less digits than its factorization.

3981616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248859 (or 248853 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 3981616 is about 1995.3987070257. The cubic root of 3981616 is about 158.4965418346.

The spelling of 3981616 in words is "three million, nine hundred eighty-one thousand, six hundred sixteen".