3813871840 has 24 divisors (see below), whose sum is σ = 9010272600. Its totient is φ = 1525548672.

The previous prime is 3813871837. The next prime is 3813871847. The reversal of 3813871840 is 481783183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813871847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11918190 + ... + 11918509.

It is an arithmetic number, because the mean of its divisors is an integer number (375428025).

Almost surely, 2^3813871840 is an apocalyptic number.

It is an amenable number.

3813871840 is an abundant number, since it is smaller than the sum of its proper divisors (5196400760).

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

3813871840 is a wasteful number, since it uses less digits than its factorization.

3813871840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23836714 (or 23836706 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 3813871840 is about 61756.5530126156. The cubic root of 3813871840 is about 1562.3872937585.

The spelling of 3813871840 in words is "three billion, eight hundred thirteen million, eight hundred seventy-one thousand, eight hundred forty".