2056638 has 16 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 679896.

The previous prime is 2056631. The next prime is 2056661. The reversal of 2056638 is 8366502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (259200).

2^2056638 is an apocalyptic number.

2056638 is an abundant number, since it is smaller than the sum of its proper divisors (2090562).

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

2056638 is a wasteful number, since it uses less digits than its factorization.

2056638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2056638 is about 1434.0983229890. The cubic root of 2056638 is about 127.1703750082.

The spelling of 2056638 in words is "two million, fifty-six thousand, six hundred thirty-eight".