2172839394 has 64 divisors (see below), whose sum is σ = 5237913600. Its totient is φ = 592753920.

The previous prime is 2172839363. The next prime is 2172839401. The reversal of 2172839394 is 4939382712.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16294 + ... + 67905.

It is an arithmetic number, because the mean of its divisors is an integer number (81842400).

Almost surely, 2^2172839394 is an apocalyptic number.

2172839394 is an abundant number, since it is smaller than the sum of its proper divisors (3065074206).

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

2172839394 is a wasteful number, since it uses less digits than its factorization.

2172839394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84255.

The product of its digits is 653184, while the sum is 48.

The square root of 2172839394 is about 46613.7253821232. The cubic root of 2172839394 is about 1295.2170184340.

The spelling of 2172839394 in words is "two billion, one hundred seventy-two million, eight hundred thirty-nine thousand, three hundred ninety-four".