2005801782 has 16 divisors (see below), whose sum is σ = 4012580592. Its totient is φ = 668437760.

The previous prime is 2005801781. The next prime is 2005801807. The reversal of 2005801782 is 2871085002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005801781) 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, 12519 + ... + 64562.

It is an arithmetic number, because the mean of its divisors is an integer number (250786287).

Almost surely, 2^2005801782 is an apocalyptic number.

2005801782 is an abundant number, since it is smaller than the sum of its proper divisors (2006778810).

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

2005801782 is a wasteful number, since it uses less digits than its factorization.

2005801782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81423.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 2005801782 is about 44786.1784705951. The cubic root of 2005801782 is about 1261.1381716181.

Adding to 2005801782 its reverse (2871085002), we get a palindrome (4876886784).

The spelling of 2005801782 in words is "two billion, five million, eight hundred one thousand, seven hundred eighty-two".