4400809 has 4 divisors (see below), whose sum is σ = 5029504. Its totient is φ = 3772116.

The previous prime is 4400801. The next prime is 4400813. The reversal of 4400809 is 9080044.

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 4400809 - 2³ = 4400801 is a prime.

It is a Duffinian number.

4400809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4400801) 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, 314337 + ... + 314350.

It is an arithmetic number, because the mean of its divisors is an integer number (1257376).

Almost surely, 2^4400809 is an apocalyptic number.

It is an amenable number.

4400809 is a deficient number, since it is larger than the sum of its proper divisors (628695).

4400809 is an equidigital number, since it uses as much as digits as its factorization.

4400809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628694.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 4400809 is about 2097.8105252858. The cubic root of 4400809 is about 163.8742963972.

The spelling of 4400809 in words is "four million, four hundred thousand, eight hundred nine".