8209239940 has 96 divisors (see below), whose sum is σ = 20132582400. Its totient is φ = 2780046720.

The previous prime is 8209239911. The next prime is 8209239953. The reversal of 8209239940 is 499329028.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 229977 + ... + 263263.

It is an arithmetic number, because the mean of its divisors is an integer number (209714400).

Almost surely, 2^8209239940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8209239940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10066291200).

8209239940 is an abundant number, since it is smaller than the sum of its proper divisors (11923342460).

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

8209239940 is a wasteful number, since it uses less digits than its factorization.

8209239940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33385 (or 33383 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 8209239940 is about 90604.8560508762. The cubic root of 8209239940 is about 2017.2868142034.

The spelling of 8209239940 in words is "eight billion, two hundred nine million, two hundred thirty-nine thousand, nine hundred forty".