2890445989 has 4 divisors (see below), whose sum is σ = 2892213324. Its totient is φ = 2888678656.

The previous prime is 2890445981. The next prime is 2890445993. The reversal of 2890445989 is 9895440982.

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 339185889 + 2551260100 = 18417^2 + 50510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890445989 - 2³ = 2890445981 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2890445981) 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, 881212 + ... + 884485.

It is an arithmetic number, because the mean of its divisors is an integer number (723053331).

Almost surely, 2^2890445989 is an apocalyptic number.

It is an amenable number.

2890445989 is a deficient number, since it is larger than the sum of its proper divisors (1767335).

2890445989 is a wasteful number, since it uses less digits than its factorization.

2890445989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767334.

The product of its (nonzero) digits is 7464960, while the sum is 58.

The square root of 2890445989 is about 53762.8681247569. The cubic root of 2890445989 is about 1424.4753975798.

The spelling of 2890445989 in words is "two billion, eight hundred ninety million, four hundred forty-five thousand, nine hundred eighty-nine".