3831319640 has 16 divisors (see below), whose sum is σ = 8620469280. Its totient is φ = 1532527840.

The previous prime is 3831319627. The next prime is 3831319673. The reversal of 3831319640 is 469131383.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3831319594 and 3831319603.

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, 47891456 + ... + 47891535.

It is an arithmetic number, because the mean of its divisors is an integer number (538779330).

Almost surely, 2^3831319640 is an apocalyptic number.

It is an amenable number.

3831319640 is an abundant number, since it is smaller than the sum of its proper divisors (4789149640).

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

3831319640 is a wasteful number, since it uses less digits than its factorization.

3831319640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95783002 (or 95782998 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3831319640 is about 61897.6545597650. The cubic root of 3831319640 is about 1564.7662197111.

The spelling of 3831319640 in words is "three billion, eight hundred thirty-one million, three hundred nineteen thousand, six hundred forty".