890448042889 has 4 divisors (see below), whose sum is σ = 893912821524. Its totient is φ = 886983264256.

The previous prime is 890448042871. The next prime is 890448042929. The reversal of 890448042889 is 988240844098.

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 620458686864 + 269989356025 = 787692^2 + 519605^2 .

It is a cyclic number.

It is not a de Polignac number, because 890448042889 - 2⁹ = 890448042377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 890448042889.

It is not an unprimeable number, because it can be changed into a prime (890448052889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732388932 + ... + 1732389445.

It is an arithmetic number, because the mean of its divisors is an integer number (223478205381).

Almost surely, 2^890448042889 is an apocalyptic number.

It is an amenable number.

890448042889 is a deficient number, since it is larger than the sum of its proper divisors (3464778635).

890448042889 is a wasteful number, since it uses less digits than its factorization.

890448042889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464778634.

The product of its (nonzero) digits is 42467328, while the sum is 64.

The spelling of 890448042889 in words is "eight hundred ninety billion, four hundred forty-eight million, forty-two thousand, eight hundred eighty-nine".