2005722 has 24 divisors (see below), whose sum is σ = 4507776. Its totient is φ = 668412.

The previous prime is 2005693. The next prime is 2005723. The reversal of 2005722 is 2275002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2005695 and 2005704.

It is not an unprimeable number, because it can be changed into a prime (2005723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1578 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (187824).

2^2005722 is an apocalyptic number.

2005722 is an abundant number, since it is smaller than the sum of its proper divisors (2502054).

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

2005722 is an equidigital number, since it uses as much as digits as its factorization.

2005722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144 (or 4132 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 2005722 is about 1416.2351499663. The cubic root of 2005722 is about 126.1121450547.

Adding to 2005722 its product of nonzero digits (280), we get a palindrome (2006002).

The spelling of 2005722 in words is "two million, five thousand, seven hundred twenty-two".