8890221 has 4 divisors (see below), whose sum is σ = 11853632. Its totient is φ = 5926812.

The previous prime is 8890187. The next prime is 8890223. The reversal of 8890221 is 1220988.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8890221 - 2⁷ = 8890093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8890223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481701 + ... + 1481706.

It is an arithmetic number, because the mean of its divisors is an integer number (2963408).

Almost surely, 2^8890221 is an apocalyptic number.

It is an amenable number.

8890221 is a deficient number, since it is larger than the sum of its proper divisors (2963411).

8890221 is a wasteful number, since it uses less digits than its factorization.

8890221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963410.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 8890221 is about 2981.6473634553. The cubic root of 8890221 is about 207.1591811607.

It can be divided in two parts, 88 and 90221, that added together give a palindrome (90309).

The spelling of 8890221 in words is "eight million, eight hundred ninety thousand, two hundred twenty-one".