3680409 has 4 divisors (see below), whose sum is σ = 4907216. Its totient is φ = 2453604.

The previous prime is 3680407. The next prime is 3680431. The reversal of 3680409 is 9040863.

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 not a de Polignac number, because 3680409 - 2¹ = 3680407 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3680409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3680401) 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, 613399 + ... + 613404.

It is an arithmetic number, because the mean of its divisors is an integer number (1226804).

Almost surely, 2^3680409 is an apocalyptic number.

It is an amenable number.

3680409 is a deficient number, since it is larger than the sum of its proper divisors (1226807).

3680409 is a wasteful number, since it uses less digits than its factorization.

3680409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226806.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 3680409 is about 1918.4392093574. The cubic root of 3680409 is about 154.3945720348.

The spelling of 3680409 in words is "three million, six hundred eighty thousand, four hundred nine".