2539656 has 48 divisors (see below), whose sum is σ = 7862400. Its totient is φ = 725472.

The previous prime is 2539651. The next prime is 2539657. The reversal of 2539656 is 6569352.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2¹³ + 5³ + 3¹² + 9² + 6² + 5⁹ + 6⁶ .

It is a self number, because there is not a number n which added to its sum of digits gives 2539656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2016 + ... + 3023.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

2^2539656 is an apocalyptic number.

It is an amenable number.

2539656 is an abundant number, since it is smaller than the sum of its proper divisors (5322744).

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

2539656 is a wasteful number, since it uses less digits than its factorization.

2539656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5058 (or 5051 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 2539656 is about 1593.6298189981. The cubic root of 2539656 is about 136.4347391615.

It can be divided in two parts, 25396 and 56, that added together give a palindrome (25452).

The spelling of 2539656 in words is "two million, five hundred thirty-nine thousand, six hundred fifty-six".