3648809 has 4 divisors (see below), whose sum is σ = 3774660. Its totient is φ = 3522960.

The previous prime is 3648797. The next prime is 3648833. The reversal of 3648809 is 9088463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9088463 = 2143 ⋅4241.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 2111209 = 1240^2 + 1453^2 .

It is a cyclic number.

It is not a de Polignac number, because 3648809 - 2⁸ = 3648553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3648859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62882 + ... + 62939.

It is an arithmetic number, because the mean of its divisors is an integer number (943665).

Almost surely, 2^3648809 is an apocalyptic number.

It is an amenable number.

3648809 is a deficient number, since it is larger than the sum of its proper divisors (125851).

3648809 is a wasteful number, since it uses less digits than its factorization.

3648809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125850.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 3648809 is about 1910.1855930773. The cubic root of 3648809 is about 153.9514239327.

The spelling of 3648809 in words is "three million, six hundred forty-eight thousand, eight hundred nine".