2438985989 has 18 divisors (see below), whose sum is σ = 2699701830. Its totient is φ = 2201783760.

The previous prime is 2438985973. The next prime is 2438986003. The reversal of 2438985989 is 9895898342.

It can be written as a sum of positive squares in only one way, i.e., 2319192964 + 119793025 = 48158^2 + 10945^2 .

It is not a de Polignac number, because 2438985989 - 2⁴ = 2438985973 is a prime.

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 (2438985889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4791467 + ... + 4791975.

It is an arithmetic number, because the mean of its divisors is an integer number (149983435).

Almost surely, 2^2438985989 is an apocalyptic number.

It is an amenable number.

2438985989 is a deficient number, since it is larger than the sum of its proper divisors (260715841).

2438985989 is an equidigital number, since it uses as much as digits as its factorization.

2438985989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 719 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 65.

The square root of 2438985989 is about 49386.0910479864. The cubic root of 2438985989 is about 1346.0765810458.

The spelling of 2438985989 in words is "two billion, four hundred thirty-eight million, nine hundred eighty-five thousand, nine hundred eighty-nine".