8399744 has 32 divisors (see below), whose sum is σ = 16891200. Its totient is φ = 4160512.

The previous prime is 8399737. The next prime is 8399773. The reversal of 8399744 is 4479938.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 8399695 and 8399704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17297 + ... + 17775.

It is an arithmetic number, because the mean of its divisors is an integer number (527850).

Almost surely, 2^8399744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8399744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8445600).

8399744 is an abundant number, since it is smaller than the sum of its proper divisors (8491456).

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

8399744 is a wasteful number, since it uses less digits than its factorization.

8399744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 618 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 8399744 is about 2898.2311847056. The cubic root of 8399744 is about 203.2772062827.

The spelling of 8399744 in words is "eight million, three hundred ninety-nine thousand, seven hundred forty-four".