2566840 has 16 divisors (see below), whose sum is σ = 5775480. Its totient is φ = 1026720.

The previous prime is 2566829. The next prime is 2566859. The reversal of 2566840 is 486652.

2566840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 32046 + ... + 32125.

2^2566840 is an apocalyptic number.

2566840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566840 is an abundant number, since it is smaller than the sum of its proper divisors (3208640).

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

2566840 is a wasteful number, since it uses less digits than its factorization.

2566840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64182 (or 64178 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2566840 is about 1602.1360741210. The cubic root of 2566840 is about 136.9198031711.

The spelling of 2566840 in words is "two million, five hundred sixty-six thousand, eight hundred forty".