8209401822 has 72 divisors (see below), whose sum is σ = 18946005624. Its totient is φ = 2567945952.

The previous prime is 8209401727. The next prime is 8209401829. The reversal of 8209401822 is 2281049028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8209401829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 496533 + ... + 512799.

It is an arithmetic number, because the mean of its divisors is an integer number (263138967).

Almost surely, 2^8209401822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8209401822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9473002812).

8209401822 is an abundant number, since it is smaller than the sum of its proper divisors (10736603802).

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

8209401822 is a wasteful number, since it uses less digits than its factorization.

8209401822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16374 (or 16348 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 8209401822 is about 90605.7493871112. The cubic root of 8209401822 is about 2017.3000740700.

The spelling of 8209401822 in words is "eight billion, two hundred nine million, four hundred one thousand, eight hundred twenty-two".