8449385844 has 12 divisors (see below), whose sum is σ = 19715233664. Its totient is φ = 2816461944.

The previous prime is 8449385843. The next prime is 8449385873. The reversal of 8449385844 is 4485839448.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8449385844² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8449385843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352057732 + ... + 352057755.

Almost surely, 2^8449385844 is an apocalyptic number.

It is an amenable number.

8449385844 is an abundant number, since it is smaller than the sum of its proper divisors (11265847820).

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

8449385844 is a wasteful number, since it uses less digits than its factorization.

8449385844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704115494 (or 704115492 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 57.

The square root of 8449385844 is about 91920.5409253013. The cubic root of 8449385844 is about 2036.7687089371.

The spelling of 8449385844 in words is "eight billion, four hundred forty-nine million, three hundred eighty-five thousand, eight hundred forty-four".