3686449 has 4 divisors (see below), whose sum is σ = 3970036. Its totient is φ = 3402864.

The previous prime is 3686447. The next prime is 3686477. The reversal of 3686449 is 9446863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 3150625 = 732^2 + 1775^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686449 - 2¹ = 3686447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141774 + ... + 141799.

It is an arithmetic number, because the mean of its divisors is an integer number (992509).

Almost surely, 2^3686449 is an apocalyptic number.

It is an amenable number.

3686449 is a deficient number, since it is larger than the sum of its proper divisors (283587).

3686449 is a wasteful number, since it uses less digits than its factorization.

3686449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283586.

The product of its digits is 124416, while the sum is 40.

The square root of 3686449 is about 1920.0127603743. The cubic root of 3686449 is about 154.4789859809.

It can be divided in two parts, 36864 and 49, that multiplied together give a square (1806336 = 1344²).

The spelling of 3686449 in words is "three million, six hundred eighty-six thousand, four hundred forty-nine".