4005189 has 6 divisors (see below), whose sum is σ = 5785286. Its totient is φ = 2670120.

The previous prime is 4005173. The next prime is 4005203. The reversal of 4005189 is 9815004.

It can be written as a sum of positive squares in only one way, i.e., 3932289 + 72900 = 1983^2 + 270^2 .

It is not a de Polignac number, because 4005189 - 2⁴ = 4005173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222502 + ... + 222519.

Almost surely, 2^4005189 is an apocalyptic number.

It is an amenable number.

4005189 is a deficient number, since it is larger than the sum of its proper divisors (1780097).

4005189 is a wasteful number, since it uses less digits than its factorization.

4005189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445027 (or 445024 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 4005189 is about 2001.2968295583. The cubic root of 4005189 is about 158.8087174035.

The spelling of 4005189 in words is "four million, five thousand, one hundred eighty-nine".