8421798 has 32 divisors (see below), whose sum is σ = 21000960. Its totient is φ = 2187360.

The previous prime is 8421793. The next prime is 8421799. The reversal of 8421798 is 8971248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8653 + ... + 9576.

It is an arithmetic number, because the mean of its divisors is an integer number (656280).

Almost surely, 2^8421798 is an apocalyptic number.

8421798 is an abundant number, since it is smaller than the sum of its proper divisors (12579162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8421798 is a wasteful number, since it uses less digits than its factorization.

8421798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18252.

The product of its digits is 32256, while the sum is 39.

The square root of 8421798 is about 2902.0334250315. The cubic root of 8421798 is about 203.4549560530.

The spelling of 8421798 in words is "eight million, four hundred twenty-one thousand, seven hundred ninety-eight".