3281707638 has 24 divisors (see below), whose sum is σ = 7756763976. Its totient is φ = 994456800.

The previous prime is 3281707631. The next prime is 3281707651. The reversal of 3281707638 is 8367071823.

3281707638 is a `hidden beast` number, since 3 + 2 + 8 + 1 + 7 + 0 + 7 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3281707593 and 3281707602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281707631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8286943 + ... + 8287338.

It is an arithmetic number, because the mean of its divisors is an integer number (323198499).

Almost surely, 2^3281707638 is an apocalyptic number.

3281707638 is an abundant number, since it is smaller than the sum of its proper divisors (4475056338).

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

3281707638 is a wasteful number, since it uses less digits than its factorization.

3281707638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16574300 (or 16574297 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 3281707638 is about 57286.1906396297. The cubic root of 3281707638 is about 1486.0495685236.

The spelling of 3281707638 in words is "three billion, two hundred eighty-one million, seven hundred seven thousand, six hundred thirty-eight".