8446988821 has 16 divisors (see below), whose sum is σ = 8987330560. Its totient is φ = 7938580608.

The previous prime is 8446988819. The next prime is 8446988827. The reversal of 8446988821 is 1288896448.

It is not a de Polignac number, because 8446988821 - 2¹ = 8446988819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8446988827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866245 + ... + 875941.

It is an arithmetic number, because the mean of its divisors is an integer number (561708160).

Almost surely, 2^8446988821 is an apocalyptic number.

It is an amenable number.

8446988821 is a deficient number, since it is larger than the sum of its proper divisors (540341739).

8446988821 is an equidigital number, since it uses as much as digits as its factorization.

8446988821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9881 (or 9843 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 58.

The square root of 8446988821 is about 91907.5014403068. The cubic root of 8446988821 is about 2036.5760857381.

The spelling of 8446988821 in words is "eight billion, four hundred forty-six million, nine hundred eighty-eight thousand, eight hundred twenty-one".