2056640 has 28 divisors (see below), whose sum is σ = 4898136. Its totient is φ = 822528.

The previous prime is 2056631. The next prime is 2056661. The reversal of 2056640 is 466502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894 + ... + 3533.

2^2056640 is an apocalyptic number.

2056640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2056640 is an abundant number, since it is smaller than the sum of its proper divisors (2841496).

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

2056640 is an equidigital number, since it uses as much as digits as its factorization.

2056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2056640 is about 1434.0990202911. The cubic root of 2056640 is about 127.1704162309.

The spelling of 2056640 in words is "two million, fifty-six thousand, six hundred forty".