2005656 has 32 divisors (see below), whose sum is σ = 5051760. Its totient is φ = 663552.

The previous prime is 2005613. The next prime is 2005667. The reversal of 2005656 is 6565002.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 7 ways as a sum of consecutive naturals, for example, 4416 + ... + 4848.

2^2005656 is an apocalyptic number.

It is an amenable number.

2005656 is an abundant number, since it is smaller than the sum of its proper divisors (3046104).

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

2005656 is a wasteful number, since it uses less digits than its factorization.

2005656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2005656 is about 1416.2118485594. The cubic root of 2005656 is about 126.1107617635.

The spelling of 2005656 in words is "two million, five thousand, six hundred fifty-six".