8421000844 has 6 divisors (see below), whose sum is σ = 14736751484. Its totient is φ = 4210500420.

The previous prime is 8421000817. The next prime is 8421000851. The reversal of 8421000844 is 4480001248.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1052625102 + ... + 1052625109.

Almost surely, 2^8421000844 is an apocalyptic number.

It is an amenable number.

8421000844 is a deficient number, since it is larger than the sum of its proper divisors (6315750640).

8421000844 is a wasteful number, since it uses less digits than its factorization.

8421000844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105250215 (or 2105250213 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 8421000844 is about 91766.0113767619. The cubic root of 8421000844 is about 2034.4853658227.

The spelling of 8421000844 in words is "eight billion, four hundred twenty-one million, eight hundred forty-four", and thus it is an aban number.