3889221 has 32 divisors (see below), whose sum is σ = 6251520. Its totient is φ = 2104704.

The previous prime is 3889217. The next prime is 3889241. The reversal of 3889221 is 1229883.

3889221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3889221 - 2² = 3889217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3889201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53241 + ... + 53313.

It is an arithmetic number, because the mean of its divisors is an integer number (195360).

Almost surely, 2^3889221 is an apocalyptic number.

It is an amenable number.

3889221 is a deficient number, since it is larger than the sum of its proper divisors (2362299).

3889221 is a wasteful number, since it uses less digits than its factorization.

3889221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185.

The product of its digits is 6912, while the sum is 33.

The square root of 3889221 is about 1972.1107981044. The cubic root of 3889221 is about 157.2609424505.

The spelling of 3889221 in words is "three million, eight hundred eighty-nine thousand, two hundred twenty-one".