3639839 has 8 divisors (see below), whose sum is σ = 4177440. Its totient is φ = 3106656.

The previous prime is 3639829. The next prime is 3639841. The reversal of 3639839 is 9389363.

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

It is not a de Polignac number, because 3639839 - 2¹² = 3635743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3639796 and 3639805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639829) 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, 917 + ... + 2849.

It is an arithmetic number, because the mean of its divisors is an integer number (522180).

Almost surely, 2^3639839 is an apocalyptic number.

3639839 is a deficient number, since it is larger than the sum of its proper divisors (537601).

3639839 is a wasteful number, since it uses less digits than its factorization.

3639839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its digits is 104976, while the sum is 41.

The square root of 3639839 is about 1907.8362089026. The cubic root of 3639839 is about 153.8251656176.

The spelling of 3639839 in words is "three million, six hundred thirty-nine thousand, eight hundred thirty-nine".