8209998 has 32 divisors (see below), whose sum is σ = 18479520. Its totient is φ = 2735208.

The previous prime is 8209991. The next prime is 8210017. The reversal of 8209998 is 8999028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3436 + ... + 5312.

It is an arithmetic number, because the mean of its divisors is an integer number (577485).

Almost surely, 2^8209998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8209998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9239760).

8209998 is an abundant number, since it is smaller than the sum of its proper divisors (10269522).

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

8209998 is an equidigital number, since it uses as much as digits as its factorization.

8209998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1882 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 8209998 is about 2865.3094073765. The cubic root of 8209998 is about 201.7348905919.

The spelling of 8209998 in words is "eight million, two hundred nine thousand, nine hundred ninety-eight".