2165834990 has 32 divisors (see below), whose sum is σ = 4254879456. Its totient is φ = 787212160.

The previous prime is 2165834989. The next prime is 2165835017. The reversal of 2165834990 is 994385612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385844 + ... + 391416.

It is an arithmetic number, because the mean of its divisors is an integer number (132964983).

Almost surely, 2^2165834990 is an apocalyptic number.

2165834990 is a deficient number, since it is larger than the sum of its proper divisors (2089044466).

2165834990 is a wasteful number, since it uses less digits than its factorization.

2165834990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 2165834990 is about 46538.5323146315. The cubic root of 2165834990 is about 1293.8237586520.

The spelling of 2165834990 in words is "two billion, one hundred sixty-five million, eight hundred thirty-four thousand, nine hundred ninety".