2005444520 has 32 divisors (see below), whose sum is σ = 4708437120. Its totient is φ = 767300160.

The previous prime is 2005444517. The next prime is 2005444537. The reversal of 2005444520 is 254445002.

It is a self number, because there is not a number n which added to its sum of digits gives 2005444520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088996 + ... + 1090835.

It is an arithmetic number, because the mean of its divisors is an integer number (147138660).

Almost surely, 2^2005444520 is an apocalyptic number.

2005444520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005444520 is an abundant number, since it is smaller than the sum of its proper divisors (2702992600).

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

2005444520 is a wasteful number, since it uses less digits than its factorization.

2005444520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179865 (or 2179861 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 2005444520 is about 44782.1897633423. The cubic root of 2005444520 is about 1261.0632915872.

Adding to 2005444520 its reverse (254445002), we get a palindrome (2259889522).

The spelling of 2005444520 in words is "two billion, five million, four hundred forty-four thousand, five hundred twenty".