4398989 has 4 divisors (see below), whose sum is σ = 5027424. Its totient is φ = 3770556.

The previous prime is 4398959. The next prime is 4398991. The reversal of 4398989 is 9898934.

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 4398989 - 2¹² = 4394893 is a prime.

It is a super-2 number, since 2×4398989² = 38702208444242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4398949) 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, 314207 + ... + 314220.

It is an arithmetic number, because the mean of its divisors is an integer number (1256856).

Almost surely, 2^4398989 is an apocalyptic number.

It is an amenable number.

4398989 is a deficient number, since it is larger than the sum of its proper divisors (628435).

4398989 is an equidigital number, since it uses as much as digits as its factorization.

4398989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628434.

The product of its digits is 559872, while the sum is 50.

The square root of 4398989 is about 2097.3766948262. The cubic root of 4398989 is about 163.8517026466.

Subtracting 4398989 from its reverse (9898934), we obtain a palindrome (5499945).

The spelling of 4398989 in words is "four million, three hundred ninety-eight thousand, nine hundred eighty-nine".