2005402172 has 12 divisors (see below), whose sum is σ = 3543526896. Its totient is φ = 992965920.

The previous prime is 2005402151. The next prime is 2005402213. The reversal of 2005402172 is 2712045002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2433329 + ... + 2434152.

It is an arithmetic number, because the mean of its divisors is an integer number (295293908).

Almost surely, 2^2005402172 is an apocalyptic number.

It is an amenable number.

2005402172 is a deficient number, since it is larger than the sum of its proper divisors (1538124724).

2005402172 is a wasteful number, since it uses less digits than its factorization.

2005402172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4867588 (or 4867586 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 2005402172 is about 44781.7169389473. The cubic root of 2005402172 is about 1261.0544151039.

Adding to 2005402172 its reverse (2712045002), we get a palindrome (4717447174).

The spelling of 2005402172 in words is "two billion, five million, four hundred two thousand, one hundred seventy-two".