2398889557 has 4 divisors (see below), whose sum is σ = 2398996876. Its totient is φ = 2398782240.

The previous prime is 2398889509. The next prime is 2398889569. The reversal of 2398889557 is 7559888932.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1109289636 + 1289599921 = 33306^2 + 35911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2398889557 - 2⁷ = 2398889429 is a prime.

It is a super-2 number, since 2×2398889557² = 11509342213367312498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2398889587) 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 3 ways as a sum of consecutive naturals, for example, 6048 + ... + 69529.

It is an arithmetic number, because the mean of its divisors is an integer number (599749219).

Almost surely, 2^2398889557 is an apocalyptic number.

It is an amenable number.

2398889557 is a deficient number, since it is larger than the sum of its proper divisors (107319).

2398889557 is an equidigital number, since it uses as much as digits as its factorization.

2398889557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107318.

The product of its digits is 43545600, while the sum is 64.

The square root of 2398889557 is about 48978.4601330013. The cubic root of 2398889557 is about 1338.6593774391.

The spelling of 2398889557 in words is "two billion, three hundred ninety-eight million, eight hundred eighty-nine thousand, five hundred fifty-seven".