2656839 has 8 divisors (see below), whose sum is σ = 3550720. Its totient is φ = 1767096.

The previous prime is 2656831. The next prime is 2656847. The reversal of 2656839 is 9386562.

It is an interprime number because it is at equal distance from previous prime (2656831) and next prime (2656847).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2656839 - 2³ = 2656831 is a prime.

It is a super-3 number, since 3×2656839³ = 56262233367435353157, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656797 and 2656806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656831) 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, 1092 + ... + 2550.

It is an arithmetic number, because the mean of its divisors is an integer number (443840).

2^2656839 is an apocalyptic number.

2656839 is a deficient number, since it is larger than the sum of its proper divisors (893881).

2656839 is a wasteful number, since it uses less digits than its factorization.

2656839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its digits is 77760, while the sum is 39.

The square root of 2656839 is about 1629.9812882362. The cubic root of 2656839 is about 138.5016920818.

It can be divided in two parts, 26 and 56839, that added together give a palindrome (56865).

The spelling of 2656839 in words is "two million, six hundred fifty-six thousand, eight hundred thirty-nine".