8649944 has 8 divisors (see below), whose sum is σ = 16218660. Its totient is φ = 4324968.

The previous prime is 8649937. The next prime is 8649967. The reversal of 8649944 is 4499468.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 8649895 and 8649904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540614 + ... + 540629.

Almost surely, 2^8649944 is an apocalyptic number.

It is an amenable number.

8649944 is a deficient number, since it is larger than the sum of its proper divisors (7568716).

8649944 is a wasteful number, since it uses less digits than its factorization.

8649944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081249 (or 1081245 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 8649944 is about 2941.0787136695. The cubic root of 8649944 is about 205.2758056453.

The spelling of 8649944 in words is "eight million, six hundred forty-nine thousand, nine hundred forty-four".