3893984639 has 8 divisors (see below), whose sum is σ = 3978097920. Its totient is φ = 3809924056.

The previous prime is 3893984573. The next prime is 3893984651. The reversal of 3893984639 is 9364893983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3893984639 - 2⁸ = 3893984383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3893984539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160652 + ... + 183294.

It is an arithmetic number, because the mean of its divisors is an integer number (497262240).

Almost surely, 2^3893984639 is an apocalyptic number.

3893984639 is a deficient number, since it is larger than the sum of its proper divisors (84113281).

3893984639 is a wasteful number, since it uses less digits than its factorization.

3893984639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26349.

The product of its digits is 30233088, while the sum is 62.

The square root of 3893984639 is about 62401.7999660266. The cubic root of 3893984639 is about 1573.2512228776.

The spelling of 3893984639 in words is "three billion, eight hundred ninety-three million, nine hundred eighty-four thousand, six hundred thirty-nine".