2045890189 has 24 divisors (see below), whose sum is σ = 2539573440. Its totient is φ = 1638512064.

The previous prime is 2045890169. The next prime is 2045890193. The reversal of 2045890189 is 9810985402.

It is not a de Polignac number, because 2045890189 - 2¹⁵ = 2045857421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045890159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52912 + ... + 83014.

It is an arithmetic number, because the mean of its divisors is an integer number (105815560).

Almost surely, 2^2045890189 is an apocalyptic number.

It is an amenable number.

2045890189 is a deficient number, since it is larger than the sum of its proper divisors (493683251).

2045890189 is a wasteful number, since it uses less digits than its factorization.

2045890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30209 (or 30202 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 2045890189 is about 45231.5176508593. The cubic root of 2045890189 is about 1269.4846089020.

The spelling of 2045890189 in words is "two billion, forty-five million, eight hundred ninety thousand, one hundred eighty-nine".