3649839 has 8 divisors (see below), whose sum is σ = 4875312. Its totient is φ = 2428800.

The previous prime is 3649831. The next prime is 3649871. The reversal of 3649839 is 9389463.

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

It is not a de Polignac number, because 3649839 - 2³ = 3649831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3649839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649831) 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, 2439 + ... + 3639.

It is an arithmetic number, because the mean of its divisors is an integer number (609414).

Almost surely, 2^3649839 is an apocalyptic number.

3649839 is a deficient number, since it is larger than the sum of its proper divisors (1225473).

3649839 is a wasteful number, since it uses less digits than its factorization.

3649839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217.

The product of its digits is 139968, while the sum is 42.

The square root of 3649839 is about 1910.4551813639. The cubic root of 3649839 is about 153.9659085722.

The spelling of 3649839 in words is "three million, six hundred forty-nine thousand, eight hundred thirty-nine".