2565836 has 72 divisors (see below), whose sum is σ = 6032880. Its totient is φ = 943488.

The previous prime is 2565809. The next prime is 2565847. The reversal of 2565836 is 6385652.

2565836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2565796 and 2565805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48386 + ... + 48438.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^2565836 is an apocalyptic number.

2565836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2565836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3016440).

2565836 is an abundant number, since it is smaller than the sum of its proper divisors (3467044).

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

2565836 is a wasteful number, since it uses less digits than its factorization.

2565836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 94 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 2565836 is about 1601.8227117880. The cubic root of 2565836 is about 136.9019491289.

The spelling of 2565836 in words is "two million, five hundred sixty-five thousand, eight hundred thirty-six".