8642944 has 16 divisors (see below), whose sum is σ = 17218620. Its totient is φ = 4321408.

The previous prime is 8642939. The next prime is 8642947. The reversal of 8642944 is 4492468.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33634 + ... + 33889.

Almost surely, 2^8642944 is an apocalyptic number.

It is an amenable number.

8642944 is a deficient number, since it is larger than the sum of its proper divisors (8575676).

8642944 is an equidigital number, since it uses as much as digits as its factorization.

8642944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67537 (or 67525 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 8642944 is about 2939.8884332573. Note that the first 3 decimals coincide. The cubic root of 8642944 is about 205.2204172934.

The spelling of 8642944 in words is "eight million, six hundred forty-two thousand, nine hundred forty-four".