9899744 has 12 divisors (see below), whose sum is σ = 19490184. Its totient is φ = 4949856.

The previous prime is 9899731. The next prime is 9899753. The reversal of 9899744 is 4479989.

It is a junction number, because it is equal to n+sod(n) for n = 9899692 and 9899701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154652 + ... + 154715.

It is an arithmetic number, because the mean of its divisors is an integer number (1624182).

Almost surely, 2^9899744 is an apocalyptic number.

It is an amenable number.

9899744 is a deficient number, since it is larger than the sum of its proper divisors (9590440).

9899744 is a wasteful number, since it uses less digits than its factorization.

9899744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309377 (or 309369 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 9899744 is about 3146.3858631770. The cubic root of 9899744 is about 214.7210660756.

The spelling of 9899744 in words is "nine million, eight hundred ninety-nine thousand, seven hundred forty-four".