2005173440 has 28 divisors (see below), whose sum is σ = 4774820016. Its totient is φ = 802069248.

The previous prime is 2005173439. The next prime is 2005173451. The reversal of 2005173440 is 443715002.

It is a super-4 number, since 4×2005173440⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3132764 + ... + 3133403.

Almost surely, 2^2005173440 is an apocalyptic number.

2005173440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005173440 is an abundant number, since it is smaller than the sum of its proper divisors (2769646576).

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

2005173440 is an equidigital number, since it uses as much as digits as its factorization.

2005173440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266184 (or 6266174 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2005173440 is about 44779.1630113829. The cubic root of 2005173440 is about 1261.0064688666.

Adding to 2005173440 its reverse (443715002), we get a palindrome (2448888442).

The spelling of 2005173440 in words is "two billion, five million, one hundred seventy-three thousand, four hundred forty".