2185017690 has 16 divisors (see below), whose sum is σ = 5244042528. Its totient is φ = 582671376.

The previous prime is 2185017661. The next prime is 2185017691. The reversal of 2185017690 is 967105812.

It is a super-2 number, since 2×2185017690² = 9548604611225872200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2185017691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36416932 + ... + 36416991.

It is an arithmetic number, because the mean of its divisors is an integer number (327752658).

Almost surely, 2^2185017690 is an apocalyptic number.

2185017690 is an abundant number, since it is smaller than the sum of its proper divisors (3059024838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185017690 is a wasteful number, since it uses less digits than its factorization.

2185017690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72833933.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 2185017690 is about 46744.1727919107. The cubic root of 2185017690 is about 1297.6323156112.

The spelling of 2185017690 in words is "two billion, one hundred eighty-five million, seventeen thousand, six hundred ninety".