5644809 has 20 divisors (see below), whose sum is σ = 8497104. Its totient is φ = 3734424.

The previous prime is 5644801. The next prime is 5644813. The reversal of 5644809 is 9084465.

5644809 is a `hidden beast` number, since 5 + 644 + 8 + 0 + 9 = 666.

It is not a de Polignac number, because 5644809 - 2³ = 5644801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5644801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18234 + ... + 18540.

Almost surely, 2^5644809 is an apocalyptic number.

It is an amenable number.

5644809 is a deficient number, since it is larger than the sum of its proper divisors (2852295).

5644809 is a wasteful number, since it uses less digits than its factorization.

5644809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 5644809 is about 2375.8806788221. The cubic root of 5644809 is about 178.0531865638.

The spelling of 5644809 in words is "five million, six hundred forty-four thousand, eight hundred nine".