4399889989 has 32 divisors (see below), whose sum is σ = 4985418240. Its totient is φ = 3848644800.

The previous prime is 4399889971. The next prime is 4399890043. The reversal of 4399889989 is 9899889934.

It is a happy number.

It is not a de Polignac number, because 4399889989 - 2⁵ = 4399889957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399889939) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13292554 + ... + 13292884.

It is an arithmetic number, because the mean of its divisors is an integer number (155794320).

Almost surely, 2^4399889989 is an apocalyptic number.

It is an amenable number.

4399889989 is a deficient number, since it is larger than the sum of its proper divisors (585528251).

4399889989 is a wasteful number, since it uses less digits than its factorization.

4399889989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 362797056, while the sum is 76.

The square root of 4399889989 is about 66331.6665628115. Note that the first 3 decimals coincide. The cubic root of 4399889989 is about 1638.6288843674.

Subtracting 4399889989 from its reverse (9899889934), we obtain a palindrome (5499999945).

The spelling of 4399889989 in words is "four billion, three hundred ninety-nine million, eight hundred eighty-nine thousand, nine hundred eighty-nine".