3688449 has 4 divisors (see below), whose sum is σ = 4917936. Its totient is φ = 2458964.

The previous prime is 3688393. The next prime is 3688453. The reversal of 3688449 is 9448863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3688449 - 2⁸ = 3688193 is a prime.

It is a D-number.

It is a Curzon number.

3688449 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3688449.

It is not an unprimeable number, because it can be changed into a prime (3688469) 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, 614739 + ... + 614744.

It is an arithmetic number, because the mean of its divisors is an integer number (1229484).

It is a Proth number, since it is equal to 1801 ⋅ 2¹¹ + 1 and 1801 < 2¹¹.

Almost surely, 2^3688449 is an apocalyptic number.

It is an amenable number.

3688449 is a deficient number, since it is larger than the sum of its proper divisors (1229487).

3688449 is a wasteful number, since it uses less digits than its factorization.

3688449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229486.

The product of its digits is 165888, while the sum is 42.

The square root of 3688449 is about 1920.5335196242. The cubic root of 3688449 is about 154.5069172969.

The spelling of 3688449 in words is "three million, six hundred eighty-eight thousand, four hundred forty-nine".