2005638582 has 16 divisors (see below), whose sum is σ = 4046776560. Its totient is φ = 662629632.

The previous prime is 2005638541. The next prime is 2005638587. The reversal of 2005638582 is 2858365002.

It is a super-2 number, since 2×2005638582² = 8045172243213941448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2005638582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005638587) 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, 1478407 + ... + 1479762.

It is an arithmetic number, because the mean of its divisors is an integer number (252923535).

Almost surely, 2^2005638582 is an apocalyptic number.

2005638582 is an abundant number, since it is smaller than the sum of its proper divisors (2041137978).

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

2005638582 is a wasteful number, since it uses less digits than its factorization.

2005638582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958287.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 2005638582 is about 44784.3564428473. The cubic root of 2005638582 is about 1261.1039669534.

The spelling of 2005638582 in words is "two billion, five million, six hundred thirty-eight thousand, five hundred eighty-two".