8389994844 has 96 divisors (see below), whose sum is σ = 25691904000. Its totient is φ = 2064519360.

The previous prime is 8389994831. The next prime is 8389994867. The reversal of 8389994844 is 4484999838.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221394 + ... + 256505.

It is an arithmetic number, because the mean of its divisors is an integer number (267624000).

Almost surely, 2^8389994844 is an apocalyptic number.

8389994844 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

8389994844 is an abundant number, since it is smaller than the sum of its proper divisors (17301909156).

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

8389994844 is a wasteful number, since it uses less digits than its factorization.

8389994844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477943 (or 477941 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 66.

The square root of 8389994844 is about 91596.9150353875. The cubic root of 8389994844 is about 2031.9853132916.

The spelling of 8389994844 in words is "eight billion, three hundred eighty-nine million, nine hundred ninety-four thousand, eight hundred forty-four".