9999824 has 20 divisors (see below), whose sum is σ = 19507680. Its totient is φ = 4965600.

The previous prime is 9999823. The next prime is 9999863. The reversal of 9999824 is 4289999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999823) 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, 347 + ... + 4485.

It is an arithmetic number, because the mean of its divisors is an integer number (975384).

Almost surely, 2^9999824 is an apocalyptic number.

It is an amenable number.

9999824 is a deficient number, since it is larger than the sum of its proper divisors (9507856).

9999824 is a wasteful number, since it uses less digits than its factorization.

9999824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298 (or 4292 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 9999824 is about 3162.2498320025. The cubic root of 9999824 is about 215.4422050608.

The spelling of 9999824 in words is "nine million, nine hundred ninety-nine thousand, eight hundred twenty-four".