8421244056 has 40 divisors (see below), whose sum is σ = 23587282620. Its totient is φ = 2807081136.

The previous prime is 8421244043. The next prime is 8421244061. The reversal of 8421244056 is 6504421248.

It is a super-2 number, since 2×8421244056² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8421244056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6497226 + ... + 6498521.

Almost surely, 2^8421244056 is an apocalyptic number.

It is an amenable number.

8421244056 is an abundant number, since it is smaller than the sum of its proper divisors (15166038564).

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

8421244056 is a wasteful number, since it uses less digits than its factorization.

8421244056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995765 (or 12995752 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 8421244056 is about 91767.3365419309. The cubic root of 8421244056 is about 2034.5049520334.

The spelling of 8421244056 in words is "eight billion, four hundred twenty-one million, two hundred forty-four thousand, fifty-six".