8790221 has 8 divisors (see below), whose sum is σ = 9660000. Its totient is φ = 7932240.

The previous prime is 8790193. The next prime is 8790227. The reversal of 8790221 is 1220978.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8790221 is a prime.

It is an Ulam number.

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 (8790227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346 + ... + 4403.

It is an arithmetic number, because the mean of its divisors is an integer number (1207500).

Almost surely, 2^8790221 is an apocalyptic number.

It is an amenable number.

8790221 is a deficient number, since it is larger than the sum of its proper divisors (869779).

8790221 is a wasteful number, since it uses less digits than its factorization.

8790221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 8790221 is about 2964.8306865654. The cubic root of 8790221 is about 206.3795199944.

The spelling of 8790221 in words is "eight million, seven hundred ninety thousand, two hundred twenty-one".