8816421 has 8 divisors (see below), whose sum is σ = 12446784. Its totient is φ = 5531840.

The previous prime is 8816359. The next prime is 8816447. The reversal of 8816421 is 1246188.

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 8816421 - 2⁹ = 8815909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8816461) 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, 86385 + ... + 86486.

It is an arithmetic number, because the mean of its divisors is an integer number (1555848).

Almost surely, 2^8816421 is an apocalyptic number.

It is an amenable number.

8816421 is a deficient number, since it is larger than the sum of its proper divisors (3630363).

8816421 is a wasteful number, since it uses less digits than its factorization.

8816421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172891.

The product of its digits is 3072, while the sum is 30.

The square root of 8816421 is about 2969.2458638516. The cubic root of 8816421 is about 206.5843605079.

The spelling of 8816421 in words is "eight million, eight hundred sixteen thousand, four hundred twenty-one".