8447985 has 48 divisors (see below), whose sum is σ = 18031104. Its totient is φ = 3563136.

The previous prime is 8447981. The next prime is 8447987. The reversal of 8447985 is 5897448.

8447985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8447985 - 2² = 8447981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8447985.

It is not an unprimeable number, because it can be changed into a prime (8447981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3064 + ... + 5126.

It is an arithmetic number, because the mean of its divisors is an integer number (375648).

Almost surely, 2^8447985 is an apocalyptic number.

It is an amenable number.

8447985 is an abundant number, since it is smaller than the sum of its proper divisors (9583119).

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

8447985 is a wasteful number, since it uses less digits than its factorization.

8447985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094 (or 2091 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 8447985 is about 2906.5417595486. The cubic root of 8447985 is about 203.6656142455.

The spelling of 8447985 in words is "eight million, four hundred forty-seven thousand, nine hundred eighty-five".