3981545072 has 10 divisors (see below), whose sum is σ = 7714243608. Its totient is φ = 1990772528.

The previous prime is 3981545059. The next prime is 3981545077. The reversal of 3981545072 is 2705451893.

3981545072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981545077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124423268 + ... + 124423299.

Almost surely, 2^3981545072 is an apocalyptic number.

It is an amenable number.

3981545072 is a deficient number, since it is larger than the sum of its proper divisors (3732698536).

3981545072 is a wasteful number, since it uses less digits than its factorization.

3981545072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248846575 (or 248846569 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 3981545072 is about 63099.4855129580. The cubic root of 3981545072 is about 1584.9560068329.

The spelling of 3981545072 in words is "three billion, nine hundred eighty-one million, five hundred forty-five thousand, seventy-two".