8421782292 has 216 divisors, whose sum is σ = 27400306752. Its totient is φ = 2156313600.

The previous prime is 8421782273. The next prime is 8421782293. The reversal of 8421782292 is 2922871248.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421782293) 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 71 ways as a sum of consecutive naturals, for example, 1374628 + ... + 1380740.

It is an arithmetic number, because the mean of its divisors is an integer number (126853272).

Almost surely, 2^8421782292 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 8421782292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13700153376).

8421782292 is an abundant number, since it is smaller than the sum of its proper divisors (18978524460).

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

8421782292 is a wasteful number, since it uses less digits than its factorization.

8421782292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219 (or 6207 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 8421782292 is about 91770.2691071569. The cubic root of 8421782292 is about 2034.5482956088.

The spelling of 8421782292 in words is "eight billion, four hundred twenty-one million, seven hundred eighty-two thousand, two hundred ninety-two".