3831490640 has 20 divisors (see below), whose sum is σ = 8908215924. Its totient is φ = 1532596224.

The previous prime is 3831490639. The next prime is 3831490667. The reversal of 3831490640 is 460941383.

3831490640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1607047744 + 2224442896 = 40088^2 + 47164^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 3831490594 and 3831490603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23946737 + ... + 23946896.

Almost surely, 2^3831490640 is an apocalyptic number.

It is an amenable number.

3831490640 is an abundant number, since it is smaller than the sum of its proper divisors (5076725284).

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

3831490640 is a wasteful number, since it uses less digits than its factorization.

3831490640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47893646 (or 47893640 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 3831490640 is about 61899.0358567886. The cubic root of 3831490640 is about 1564.7894989872.

The spelling of 3831490640 in words is "three billion, eight hundred thirty-one million, four hundred ninety thousand, six hundred forty".