3644809 has 8 divisors (see below), whose sum is σ = 4262720. Its totient is φ = 3051216.

The previous prime is 3644801. The next prime is 3644831. The reversal of 3644809 is 9084463.

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

It is not a de Polignac number, because 3644809 - 2³ = 3644801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3644801) 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 7 ways as a sum of consecutive naturals, for example, 5754 + ... + 6355.

It is an arithmetic number, because the mean of its divisors is an integer number (532840).

Almost surely, 2^3644809 is an apocalyptic number.

It is an amenable number.

3644809 is a deficient number, since it is larger than the sum of its proper divisors (617911).

3644809 is a wasteful number, since it uses less digits than its factorization.

3644809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12159.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 3644809 is about 1909.1382872909. The cubic root of 3644809 is about 153.8951470436.

The spelling of 3644809 in words is "three million, six hundred forty-four thousand, eight hundred nine".