4398809 has 4 divisors (see below), whose sum is σ = 4414116. Its totient is φ = 4383504.

The previous prime is 4398787. The next prime is 4398811. The reversal of 4398809 is 9088934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3763600 + 635209 = 1940^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 4398809 - 2⁸ = 4398553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4398829) 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, 7214 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (1103529).

Almost surely, 2^4398809 is an apocalyptic number.

It is an amenable number.

4398809 is a deficient number, since it is larger than the sum of its proper divisors (15307).

4398809 is a wasteful number, since it uses less digits than its factorization.

4398809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15306.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 4398809 is about 2097.3337836406. Note that the first 3 decimals coincide. The cubic root of 4398809 is about 163.8494677612.

The spelling of 4398809 in words is "four million, three hundred ninety-eight thousand, eight hundred nine".