2789809172 has 12 divisors (see below), whose sum is σ = 4949045556. Its totient is φ = 1375796160.

The previous prime is 2789809171. The next prime is 2789809199. The reversal of 2789809172 is 2719089872.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 707347216 + 2082461956 = 26596^2 + 45634^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789809171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776779 + ... + 4777362.

It is an arithmetic number, because the mean of its divisors is an integer number (412420463).

Almost surely, 2^2789809172 is an apocalyptic number.

It is an amenable number.

2789809172 is a deficient number, since it is larger than the sum of its proper divisors (2159236384).

2789809172 is a wasteful number, since it uses less digits than its factorization.

2789809172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554218 (or 9554216 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 2789809172 is about 52818.6441704063. The cubic root of 2789809172 is about 1407.7477198709.

The spelling of 2789809172 in words is "two billion, seven hundred eighty-nine million, eight hundred nine thousand, one hundred seventy-two".