3889805 has 8 divisors (see below), whose sum is σ = 4732152. Its totient is φ = 3068928.

The previous prime is 3889801. The next prime is 3889807. The reversal of 3889805 is 5089883.

It can be written as a sum of positive squares in 4 ways, for example, as 24649 + 3865156 = 157^2 + 1966^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3889805 - 2² = 3889801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3889801) 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 7 ways as a sum of consecutive naturals, for example, 4964 + ... + 5693.

It is an arithmetic number, because the mean of its divisors is an integer number (591519).

Almost surely, 2^3889805 is an apocalyptic number.

It is an amenable number.

3889805 is a deficient number, since it is larger than the sum of its proper divisors (842347).

3889805 is a wasteful number, since it uses less digits than its factorization.

3889805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10735.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 3889805 is about 1972.2588572497. The cubic root of 3889805 is about 157.2688134178.

The spelling of 3889805 in words is "three million, eight hundred eighty-nine thousand, eight hundred five".