1858044089 has 16 divisors (see below), whose sum is σ = 2052510720. Its totient is φ = 1667932560.

The previous prime is 1858044049. The next prime is 1858044101. The reversal of 1858044089 is 9804408581.

It is a happy number.

It is not a de Polignac number, because 1858044089 - 2²⁰ = 1856995513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1858044049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427244 + ... + 431570.

It is an arithmetic number, because the mean of its divisors is an integer number (128281920).

Almost surely, 2^1858044089 is an apocalyptic number.

It is an amenable number.

1858044089 is a deficient number, since it is larger than the sum of its proper divisors (194466631).

1858044089 is a wasteful number, since it uses less digits than its factorization.

1858044089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 1858044089 is about 43105.0355411059. The cubic root of 1858044089 is about 1229.3777205711.

The spelling of 1858044089 in words is "one billion, eight hundred fifty-eight million, forty-four thousand, eighty-nine".