3981038540 has 12 divisors (see below), whose sum is σ = 8360180976. Its totient is φ = 1592415408.

The previous prime is 3981038533. The next prime is 3981038543. The reversal of 3981038540 is 458301893.

It is not an unprimeable number, because it can be changed into a prime (3981038543) 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, 99525944 + ... + 99525983.

It is an arithmetic number, because the mean of its divisors is an integer number (696681748).

Almost surely, 2^3981038540 is an apocalyptic number.

It is an amenable number.

3981038540 is an abundant number, since it is smaller than the sum of its proper divisors (4379142436).

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

3981038540 is a wasteful number, since it uses less digits than its factorization.

3981038540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199051936 (or 199051934 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 3981038540 is about 63095.4716283189. The cubic root of 3981038540 is about 1584.8887913031. Note that the first 3 decimals are identical.

The spelling of 3981038540 in words is "three billion, nine hundred eighty-one million, thirty-eight thousand, five hundred forty".