3981736 has 16 divisors (see below), whose sum is σ = 8144640. Its totient is φ = 1809840.

The previous prime is 3981709. The next prime is 3981739. The reversal of 3981736 is 6371893.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3981695 and 3981704.

It is not an unprimeable number, because it can be changed into a prime (3981739) 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, 22536 + ... + 22711.

It is an arithmetic number, because the mean of its divisors is an integer number (509040).

Almost surely, 2^3981736 is an apocalyptic number.

It is an amenable number.

3981736 is an abundant number, since it is smaller than the sum of its proper divisors (4162904).

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

3981736 is a wasteful number, since it uses less digits than its factorization.

3981736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45264 (or 45260 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 3981736 is about 1995.4287759777. The cubic root of 3981736 is about 158.4981341022.

The spelling of 3981736 in words is "three million, nine hundred eighty-one thousand, seven hundred thirty-six".