2779839 has 10 divisors (see below), whose sum is σ = 4152720. Its totient is φ = 1853172.

The previous prime is 2779811. The next prime is 2779859. The reversal of 2779839 is 9389772.

It is not a de Polignac number, because 2779839 - 2⁵ = 2779807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2779794 and 2779803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779859) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17079 + ... + 17240.

It is an arithmetic number, because the mean of its divisors is an integer number (415272).

2^2779839 is an apocalyptic number.

2779839 is a deficient number, since it is larger than the sum of its proper divisors (1372881).

2779839 is an equidigital number, since it uses as much as digits as its factorization.

2779839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34331 (or 34322 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 2779839 is about 1667.2849186627. The cubic root of 2779839 is about 140.6068723300.

The spelling of 2779839 in words is "two million, seven hundred seventy-nine thousand, eight hundred thirty-nine".