8947664 has 20 divisors (see below), whose sum is σ = 18912480. Its totient is φ = 4067040.

The previous prime is 8947657. The next prime is 8947669. The reversal of 8947664 is 4667498.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8947669) 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, 25244 + ... + 25595.

It is an arithmetic number, because the mean of its divisors is an integer number (945624).

Almost surely, 2^8947664 is an apocalyptic number.

It is an amenable number.

8947664 is an abundant number, since it is smaller than the sum of its proper divisors (9964816).

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

8947664 is a wasteful number, since it uses less digits than its factorization.

8947664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50858 (or 50852 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 8947664 is about 2991.2646155096. The cubic root of 8947664 is about 207.6044009398.

It can be divided in two parts, 894 and 7664, that added together give a palindrome (8558).

The spelling of 8947664 in words is "eight million, nine hundred forty-seven thousand, six hundred sixty-four".