3658839 has 4 divisors (see below), whose sum is σ = 4878456. Its totient is φ = 2439224.

The previous prime is 3658829. The next prime is 3658847. The reversal of 3658839 is 9388563.

3658839 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9388563 = 3 ⋅3129521.

It is a cyclic number.

It is not a de Polignac number, because 3658839 - 2⁵ = 3658807 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3658839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3658829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609804 + ... + 609809.

It is an arithmetic number, because the mean of its divisors is an integer number (1219614).

Almost surely, 2^3658839 is an apocalyptic number.

3658839 is a deficient number, since it is larger than the sum of its proper divisors (1219617).

3658839 is a wasteful number, since it uses less digits than its factorization.

3658839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219616.

The product of its digits is 155520, while the sum is 42.

The square root of 3658839 is about 1912.8091906931. The cubic root of 3658839 is about 154.0923575981.

The spelling of 3658839 in words is "three million, six hundred fifty-eight thousand, eight hundred thirty-nine".