7188005 has 18 divisors (see below), whose sum is σ = 9568818. Its totient is φ = 5179680.

The previous prime is 7187993. The next prime is 7188007. The reversal of 7188005 is 5008817.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1800964 + 5387041 = 1342^2 + 2321^2 .

It is not a de Polignac number, because 7188005 - 2⁴ = 7187989 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7188007) 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 17 ways as a sum of consecutive naturals, for example, 65891 + ... + 65999.

It is an arithmetic number, because the mean of its divisors is an integer number (531601).

Almost surely, 2^7188005 is an apocalyptic number.

It is an amenable number.

7188005 is a deficient number, since it is larger than the sum of its proper divisors (2380813).

7188005 is a wasteful number, since it uses less digits than its factorization.

7188005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 7188005 is about 2681.0455050222. The cubic root of 7188005 is about 192.9905854178.

The spelling of 7188005 in words is "seven million, one hundred eighty-eight thousand, five".