3981740 has 72 divisors (see below), whose sum is σ = 10342080. Its totient is φ = 1279488.

The previous prime is 3981739. The next prime is 3981749. The reversal of 3981740 is 471893.

3981740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3981697 and 3981706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16541 + ... + 16779.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

Almost surely, 2^3981740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5171040).

3981740 is an abundant number, since it is smaller than the sum of its proper divisors (6360340).

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

3981740 is a wasteful number, since it uses less digits than its factorization.

3981740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 3981740 is about 1995.4297782683. The cubic root of 3981740 is about 158.4981871772.

The spelling of 3981740 in words is "three million, nine hundred eighty-one thousand, seven hundred forty".