3989839 has 8 divisors (see below), whose sum is σ = 4572288. Its totient is φ = 3410520.

The previous prime is 3989837. The next prime is 3989857. The reversal of 3989839 is 9389893.

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 3989839 - 2¹ = 3989837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3989792 and 3989801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989831) 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 7 ways as a sum of consecutive naturals, for example, 3624 + ... + 4594.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^3989839 is an apocalyptic number.

3989839 is a deficient number, since it is larger than the sum of its proper divisors (582449).

3989839 is an equidigital number, since it uses as much as digits as its factorization.

3989839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565.

The product of its digits is 419904, while the sum is 49.

The square root of 3989839 is about 1997.4581347302. The cubic root of 3989839 is about 158.6055780375.

The spelling of 3989839 in words is "three million, nine hundred eighty-nine thousand, eight hundred thirty-nine".